Assertion `(A) :` The nucleus of gold is stable even though there is a very strong coulombic repulsion among the protons.
Reason `(R) : ` The inverse square coulomb force is exactly balanced by another inverse square force which is very powerful. `i.e., ` nuclear force.
A. If both `(A)` and `(R)` are correct , and `(R)` is the correct explanation of `(A)`
B. If both `(A)` and `(R)` are correct, but (R) is not the correct explanation of `(A)`
C. If `(A)` is correct, but `(R)` is incorrect.
D. If `(A)` is incorrect, but `(R)` is correct.