A. Louis Pasteur
A.
B. James Watson and Francis Crick
B.
C. Robert Hooke
C.
D. None of these
D.
Correct Answer: B
সঠিক উত্তর: B
Explanation
ব্যাখ্যা
American biologists James Watson and physicist Francis Crick discovered the double helix structure of DNA in the year the 1950s.