question_answer

Mass numbers of the elements A, B, C and D are 30, 60, 90, and 120 respectively. The specific binding energy of them are 5 MeV, 8.5 MeV, 8 MeV and 7 MeV respectively. Then, in which of the following reaction/s energy is released?

(1) \[D\to 2B\]

(2) \[C\to B+A\]

(3) \[B\to 2A\]

A) only in (1)        

B) in (2), (3)

C) in (1), (3)          

D) in (1), (2) and (3)