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Home
All Subjects
CSS
CSS MPT
CSS Subjects MCQs
CSS Past Papers
Past Papers
Testing Agencies Papers
Departmental Past Papers
Post Wise Papers
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FPSC
PPSC
SPSC
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KPPSC
Current Affairs
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Subject:
Biology
Immunization by vaccination was first introduced by?
A.
Fleming in 1945
B.
Florey & Chain in 1975
C.
Flore & Chain in 1795
D.
Edward Jenner in 1795
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