Plants, Fruits, Vegetables & Nutrition

Black holes are detected through multiple methods: gravitational effects on nearby stars and gas (accretion disks), X-ray emissions from superheated matter, and gravitational waves from mergers. Optical observations can detect indirect effects but black holes don't emit visible light. Using a prism for spectrum analysis is primarily a laboratory technique for studying light, not a method for black hole detection.

When galaxies move away from us, the light they emit is stretched to longer wavelengths, shifting toward the red end of the spectrum (redshift). This is a consequence of the Doppler effect applied to light. Blueshift indicates movement toward the observer, not away.

Chafa (Plumeria or frangipani) is the Marathi name for these fragrant white and yellow flowers, commonly known for their sweet scent and ornamental beauty.

Coconut and coconut oil are well-known for their antimicrobial properties. The medium-chain fatty acids like lauric acid and caprylic acid in coconut have demonstrated antifungal and antibacterial activity.

Spinach is well-known for its iron content and also contains calcium. It's commonly recommended for addressing iron deficiency anemia. Note that 'Palak' is the Hindi word for spinach, making options C and D the same vegetable.

Beetroots are low in calories (about 43 kcal per 100g) and contain nutrients that support skin health, including vitamin C, folate, and antioxidants. Their blood-purifying properties and anti-inflammatory compounds help treat various skin problems like acne and eczema.

Tomatoes are the richest common dietary source of lycopene, a powerful antioxidant that gives them their red color. Lycopene helps protect cells from damage, reduces inflammation, and is linked to reduced risk of chronic diseases including certain cancers.

Bitter gourd (bitter melon) contains compounds like charantin, polypeptide-p, and vicine that help lower blood glucose levels. It's widely used in traditional medicine systems like Ayurveda for diabetes management and has shown blood sugar-lowering effects in studies.

Watermelon is approximately 92% water, making it extremely hydrating and refreshing during hot weather. It contains electrolytes like potassium, natural sugars for quick energy, and has a cooling effect on the body - perfect for summer consumption.

Bananas contain high levels of potassium (for blood pressure), vitamin B6 (for brain function and depression), iron (for anemia), and dietary fiber (for constipation). Their tryptophan content helps with serotonin production, aiding mood regulation and depression management.

Calcium is the primary mineral responsible for building and maintaining strong bones and teeth. About 99% of the body's calcium is stored in bones, providing structural strength. Adequate calcium intake throughout life, combined with vitamin D, is essential for preventing osteoporosis.

Amla (Indian gooseberry) contains approximately 600-900mg of vitamin C per 100g, making it one of the richest natural sources. This far exceeds oranges (about 53mg/100g). Amla's vitamin C is also heat-stable and better retained than in many other fruits.

Mushrooms are nutritionally dense - they contain all essential amino acids (making them a complete protein source), B vitamins including B12 in some varieties, minerals like selenium, and are one of the few non-animal sources of vitamin D2 (from ergosterol when exposed to UV light).

Mangifera indica is the scientific (botanical) name for the mango tree and fruit. Scientific names in binomial nomenclature uniquely identify species worldwide, regardless of local names. The other options listed (chickoo/sapodilla, kiwi, pineapple) have different scientific names and are not Mangifera indica.

Hibiscus rosa-sinensis is the botanical name for what is commonly called the shoe flower (or china rose). This species of hibiscus is widely known as shoeflower in many regions due to the shape of its flower. The other options are different flowers: rose, sunflower, and mogra (Arabian jasmine).

Brassica capitata is the scientific name for cabbage. The species name 'capitata' refers to the 'head' formation characteristic of cabbage. The other options are different vegetables: brinjal (eggplant), cauliflower (which is Brassica oleracea), and spinach (which is Spinacia oleracea).

Artocarpus heterophyllus is the botanical name for jackfruit (also spelled jackfruit). This tropical fruit is the largest tree-borne fruit in the world. The other options listed are different plants: cashew (Anacardium occidentale), lime (Citrus aurantiifolia), and apple (Malus domestica).