Human Health and Nutrition

The Recommended Dietary Allowance (RDA) for protein is approximately 0.8g per kg of body weight for adults. For an average 57kg woman, this equals about 46g daily. Moderately active individuals may need slightly more.

Normal fasting blood sugar levels are typically 80-90 mg/dL (not mg/ml as written - this appears to be a unit error in the question). Post-meal levels can rise to around 140 mg/dL. Levels above 126 mg/dL (fasting) may indicate diabetes. Option C is correct in numerical value despite the unit inconsistency.

The recommended daily vegetable intake for adults is approximately 250-300 grams according to dietary guidelines from organizations like WHO and ICMR. This ensures adequate fiber, vitamins, and minerals. 250g represents a practical recommendation from nutrition science.

Vitamin D promotes absorption and use of calcium and phosphate for healthy bones and teeth.

120/80 mm Hg is the universally accepted standard normal blood pressure reading for healthy adults. 110/75 is on the low side while 145/90 falls in the hypertensive range, making them incorrect as 'normal' values.

Normal adult blood pressure is typically defined as 120/80 mm Hg (systolic/diastolic). The systolic pressure (120) represents arterial pressure during heart contraction, while diastolic (80) is pressure between beats when the heart relaxes. This standard is based on extensive epidemiological studies linking blood pressure to cardiovascular health.

Yes, it is correct. The amount of recommended water per person, according to the UN is 50 litres.

An average adult human has 5 to 6 liters of blood, approximately 7% of body weight. This can range from 4.5 to 5.5 liters in females and 5 to 6 liters in males. 3-4 liters is too low, and 10+ liters is far above normal capacity.

This is the correct option. In an adult human, there is about 5.5 litres of blood.

This is the normal systolic blood pressure of an adult man. The maximum normal B.P. should not exceed 150 mm Hg in adult males.

The standard average blood pressure for a healthy adult is 120/80 mmHg, where 120 is the systolic pressure and 80 is the diastolic pressure.

Adults typically need 2000-2500 calories per day to maintain weight. This varies based on activity level, gender, age, and metabolism. Option D represents the standard dietary recommendation for adults.

Minimum 3 litres to 5 litres of water is recommended for good health and comfortable metabolism in the body.

The recommended dietary allowance for protein for a healthy adult is generally accepted as 0.8 to 1.0 grams per kilogram of body weight. Among the provided options, 1.5 gm/kg is the closest standard recommendation for active individuals or specific clinical guidelines.