13.
Match List I correctly with List II and select your answer using the codes given below:
Answer : D. a-3 ,b-2 ,c-1 ,d-4
14.
Answer : C. a-4 ,b-1 ,c-2 ,d-3
15.
Einstein was awarded Nobel Prize for
Answer : B. Photo electric effect
16.
Wave theory was proposed by
Answer : B. Huygen
17.
Printing for the blind was introduced by
Answer : B. Louis Braille
18.
Chadwick discovered
Answer : D. neutron