Inventors and Scientific Discoveries

The Wright Brothers (Orville and Wilbur Wright) invented and flew the first successful airplane in 1903. They are credited with pioneering controlled, sustained flight.

Thomas Edison is credited with inventing the practical electric light bulb in 1879. While other scientists contributed to early electric lighting concepts, Edison developed the first commercially viable incandescent bulb with a long-lasting filament. Isaac Newton is known for physics laws, Graham Bell invented the telephone, and Marconi developed radio telegraphy.

The correct answer is B (Roentgen). Wilhelm Roentgen discovered X-rays in 1895, a breakthrough that earned him the first Nobel Prize in Physics in 1901. The other names (Land, Eastman, Kodak) are associated with photography but not X-ray discovery.

Philo Farnsworth is credited as the inventor of the first fully electronic television system. He developed the image dissector tube and demonstrated electronic television in 1927, making significant contributions to television technology.

The Rh factor was discovered through research on Rhesus Macaques (Macaca mulatta). Scientists Landsteiner and Wiener found that rabbits injected with rhesus monkey red blood cells produced an antibody that also agglutinated human red cells.

The world's first successful kidney transplant was performed in 1954 by Dr. Joseph Murray and his team at Harvard University's Peter Bent Brigham Hospital in Boston. The surgery was between identical twins. Option C (Harvard) is correct. This was a groundbreaking medical achievement that earned Murray the Nobel Prize.

Albert Einstein developed the Theory of Relativity, published in 1905 (Special Relativity) and 1915 (General Relativity). Isaac Newton developed classical mechanics and gravity, not relativity. Marie Curie discovered radioactivity and polonium/radium. Benjamin Franklin was a statesman and scientist known for electricity experiments, not relativity.

Benjamin Franklin invented the lightning conductor (lightning rod) in 1752 through his famous kite experiment demonstrating lightning's electrical nature. This invention protects buildings by safely conducting lightning strikes to the ground. Franklin was a polymath scientist, not primarily known for physics like Einstein or Newton.

Heron of Alexandria created the aeolipile, the first known steam engine, in the 1st century AD. Newcomen built the first practical steam engine (1712), and Watt improved it (1769). The question claims Heron is correct.

Dr. Martin Cooper, working at Motorola, made the first handheld mobile phone call in 1973 and is widely credited as the inventor of the modern mobile phone. Joel Engel was a rival at Bell Labs, while Thomas Savery and Newcomen were steam engine inventors from centuries earlier.

Karl Drais invented the Laufmaschine (running machine) in 1817, widely considered the first bicycle precursor. The Michaux family (Pierre and Ernest) later developed pedal-equipped velocipedes in the 1860s. Karl Michaux is not a historically significant figure in bicycle history.

Friedrich August Kekulé discovered that benzene has a closed ring structure with alternating double bonds in 1865. The ring structure explained benzene's unusual stability and chemical properties. Prior to this, chemists had proposed linear or open-chain structures. Benzene's six carbon atoms form a hexagonal ring, which is why 'Closed Ring' is the correct answer over squares, rectangles, or boxes.

Alexander Graham Bell's mother Eliza Grace Symonds and wife Mabel Hubbard were both deaf. Bell's work with the deaf community, including teaching elocution to the deaf, directly inspired his invention of the telephone. This personal connection made him never need to telephone them.

'The Origin of Species' is Charles Darwin's groundbreaking 1859 work that introduced the scientific theory of evolution by natural selection. It is considered the foundation of evolutionary biology and one of the most influential scientific books ever written. Neither Dickens nor Rajagopalachari nor Bhagat authored this work.