Who discovered that blood can be categorized into various Rh factors (positive and negative)? MCQ with Answer and Explanation

Who discovered that blood can be categorized into various Rh factors (positive and negative)?
A. Edward Jenner
B. Robert Koch
C. Karl Landsteiner and Alexander Wiener
D. William Harvey
Answer: Option C
Solution (By JKSSB Mock Tests)
Karl Landsteiner and Alexander S. Wiener discovered the Rhesus (Rh) factor in blood in 1937.

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Practice More Inventions and Discoveries Questions

Question #1
Who discovered the biological presence of blood platelets and their exact role in physical blood coagulation?
A. Marcello Malpighi
B. William Harvey
C. Giulio Bizzozero
D. Karl Landsteiner

Correct Answer: Option C


Explanation:
Italian pathologist Bizzozero identified blood platelets ('piastrine') in 1882, describing how they aggregate to plug damaged blood vessels.

Question #2
Who discovered that yellow fever is transmitted by a specific mosquito species rather than direct human contact?
A. Louis Pasteur
B. Carlos Finlay
C. Ronald Ross
D. Walter Reed

Correct Answer: Option D


Explanation:
Major Walter Reed led the commission that experimentally proved Carlos Finlay's theory that yellow fever is transmitted by the Aedes aegypti mosquito.

Question #3
Who invented the lithium-ion battery architecture, winning the Nobel Prize in Chemistry in 2019?
A. Gaston Planté
B. Thomas Edison
C. Alessandro Volta
D. John B. Goodenough, M. Stanley Whittingham, and Akira Yoshino

Correct Answer: Option D


Explanation:
These three scientists developed the lightweight, rechargeable, and highly energetic lithium-ion battery technology.