What was the invention of William Einthoven?
- (A) Radar
- (B) LASER
- (C) Electro-cardiograph
- (D) Ultrasound machine
- (C) Electro-cardiograph
“Robert Koch” worked on which of the following diseases?
- (A) Cholera
- (B) Malaria
- (C) Diabetes
- (D) Tuberculosis
- (D) Tuberculosis
When Laszlo and Biro invented ballpoint pen?
- (A) 1933
- (B) 1938
- (C) 1955
- (D) 1959
- (B) 1938