Who discovered the polio vaccine?
A. Alexander Flemming
B. Jones Salk
C. Robert Koach
D. Edward Genere
Answer: Option B
A. Alexander Flemming
B. Jones Salk
C. Robert Koach
D. Edward Genere
Answer: Option B
Which one of the following is useful in the treatment of scurvy disease?
A. Mango
B. Papaya
C. Aonia
D. Ber
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