1. Who invented Aeroplane

Answer: Orville & Wilbur Wright in 1903

2. Who invented Vitamin K ?

Answer: Doisy Dam of U.S.A. in 1938.

3. Who invented Laptop ?

Answer:

Adam Osborne in 1981.

4. Who invented Stethoscope ?

Answer: Laennec of French in 1819.

5. Who invented paper ?

Answer:

Cai Lun

6. Who invented Bleaching Powder ?

Answer: Tennant of Britain in 1798

7. Who invented Locomotive ?

Answer:

George Stephenson was first to buit steam locomotives.