1. Who invented Vitamin A ?

Answer: Mc Collum and M.Davis of U.S.A. in 1913

2. Who invented Diesel Engine ?

Answer: Rudoff Diesel of Germany in 1895

3. Who invented Bacteria ?

Answer: Leeuwenhock of Netherlands in 1683

4. Who invented Automatic rifle ?

Answer: John Browning of U.S.A. in 1918.

5. Who invented Morphine ?

Answer: Friderich Sertumer of Germany in 1805

6. Who invented Relativity Theory ?

Answer: Einstein of Germany in 1905.

7. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams