Assertion (A): All the carbon atoms in `H_(2)C = C = CH_(2)` are `sp^(2)` hybridised.
Reason (R) : In this molecule all the carbon atoms are attached to each other by double bonds.
A. Both A and R are correct and R is the correct explanation of A.
B. Both A and R are correct but R is not the correct explanation of A.
C. Both A and R are not correct.
D. A is not correct but R is correct.