In each of the following two questions two statements are given one labelled as the Assertion(A) or Statement I and the other labelled as the reason (R) or statement II. Examine these statements carefully and mark the correct choice as per following instructions
Assertion (A) - Both 106 g of sodium carbonate and 12 g of graphite have same number of carbon atoms
Reason (R) - Both 106 g sodium carbonate and 12 g of graphite contain 1 g-atom of carbon
A. Both A and R are 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