Assertion (A) : Neutrons have no charge but protons are positively charged, hence net result is repulsion in them in the nucleus of an atom. In the presence of this repulsion the nucleus is highly stable.
Reason (R) : The pair of nucleous (neutrons and protons) continuously exchanges the charge through mesons which may either be positively or negatively charged.

Options

A. Both A and R true and R is the correct explanation of A
B. Both A and R are true but R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true

Answer

A