Given below are two statements: one is labelled Assertion(A) and other is labelled Reason(R).

Assertion (A): Male honey bees do not have father and thus cannot have sons, but have a grand father and can have grand sons.
Reason (R): An unfertilised egg develops into a male bee by means of parthenogenesis and fertilised egg develops into a female bee.

In the light of above statements, choose the correct answer from the options given below.