1. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

2. Who invented Transformer ?

Answer:

Ottó Bláthy

3. Who invented Chloroform as anaesthetic ?

Answer: James Simpson of Britain in 1847.

4. Who invented Vitamin C ?

Answer:

Scottish naval surgeon James Lind in 1747

5. Who invented X-ray ?

Answer: W.K. Roentgen of Germany in 1895.

6. Who invented Printing Press ?

Answer:

Johannes Gutenberg

7. Who invented paper ?

Answer:

Cai Lun