1. Who invented Vitamin D ?

Answer:

Edward Mellanby discovered Vitamin D while researching a disease called rickets in 1922

2. Who invented Blood Transfusion ?

Answer: Jean-Baptiste Denys of France in 1625.

3. Who invented Telescope ?

Answer: Hans Lippershey of Netherlands in 1608.

4. Who invented Logarithms ?

Answer:

John Napier (Scotland) invented Logarithm

5. Who invented Transformer ?

Answer:

Ottó Bláthy

6. Who invented Diesel Engine ?

Answer: Rudoff Diesel of Germany in 1895

7. Who invented Vitamin A ?

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