Who discovered the principles of vaccination, microbial fermentation, and pasteurization? MCQ with Answer and Explanation

Question
Who discovered the principles of vaccination, microbial fermentation, and pasteurization?
A. Robert Koch
B. Antonie van Leeuwenhoek
C. Edward Jenner
D. Louis Pasteur
Answer: Option D
Solution (By JKSSB Mock Tests)
Louis Pasteur's extensive contributions include vaccines for rabies and anthrax, pasteurization, and germ theory breakthroughs.
This question belongs to: Static General Knowledge Inventions and Discoveries
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Question #1
The invention of the common electric toaster mechanism was achieved using nichrome wire by whom?
A. Albert Marsh and George Schneider
B. Nikola Tesla
C. Thomas Edison
D. Elisha Otis
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Correct Answer: Option A

Explanation:
Albert Marsh patented Nichrome resistance wire alloy, which enabled safe high-heat cycling within appliances like toasters.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #2
The cosmic microwave background radiation, confirming the Big Bang theory, was discovered by whom?
A. Stephen Hawking
B. Edwin Hubble
C. Arno Penzias and Robert Wilson
D. Albert Einstein
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Correct Answer: Option C

Explanation:
Arno Penzias and Robert Wilson accidentally discovered cosmic microwave background radiation in 1964, winning a Nobel Prize.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #3
The invention of the common maritime signaling system known as the heliograph was optimized by whom?
A. Guglielmo Marconi
B. Alexander Graham Bell
C. Benjamin Franklin
D. Sir Henry Christopher Mance
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Correct Answer: Option D

Explanation:
Mance engineered the specialized flash mirror signaling device in the 1870s for military communications across arid frontier terrain.
This question belongs to: Static General Knowledge Inventions and Discoveries
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