Assertion (A) : In CO molecule, 12 parts by mass of carbon combine with 16 parts by mass of oxygen and in `CO_(2)`, 12 parts by mass of carbon combine with 32 parts by mass of oxygen.
Reason (R) : When two elements combine separately with a fixed mass of a third element, then the ratio of their masses in which they do so is either the same or whole number multiple of the ratio in which they combine with each other.

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

B