1. Who invented X-ray ?

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

2. Who invented CT scan ?

Answer: Hounsfield by Britain in 1973.

3. Who invented Atomic theory ?

Answer: Dalton of Britain in 1803.

4. Who invented Bakelite ?

Answer: Leo H. Baekeland of Belgium in 1907.

5. Who invented Ballistic missile ?

Answer: Wemher von Braun of Germany in 1944.

6. Who invented HIV ?

Answer:

7. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist