1. Who invented DNA Structure ?

Answer: Crick(UK), Waston(US), Wilkins(UK) in 1951

2. Who invented Laptop ?

Answer:

Adam Osborne in 1981.

3. Who invented Aeroplane

Answer: Orville & Wilbur Wright in 1903

4. Who invented Logarithms ?

Answer:

John Napier (Scotland) invented Logarithm

5. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

6. Who invented Bleaching Powder ?

Answer: Tennant of Britain in 1798

7. Who invented Ballistic missile ?

Answer: Wemher von Braun of Germany in 1944.