মূল বিষয়বস্তুতে যান

State PCS PYQPrelims 2022

BPSC – Combined Competitive Examination · প্রশ্ন 112

Which scientist/physician first introduced vaccination?

Robert Koch
Élie Metchnikoff
Edward Jenner
Joseph Lister
None of the above / More than one of the above

উত্তর দেখান ও ব্যাখ্যা

উত্তর: (C) Edward Jenner

ব্যাখ্যা

Edward Jenner used cowpox to protect against smallpox, founding vaccination.

(A) ভুল
Wrong: discovered TB and cholera bacteria.
(B) ভুল
Wrong: discovered phagocytosis.
(C) সঠিক
Correct: Jenner developed the smallpox vaccine (1796).
(D) ভুল
Wrong: pioneered antiseptic surgery.
(E) ভুল
Wrong: only one of the options A–D is correct.