Assertion (A): `CH_4` , `C_2H_6` , `C_3H_8` is a homologous series. Reason (R) : A homologous series of carbon compounds which two successive compounds differ by-CH unit.

Options

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