Answer:
The correct answer is:
(D). C2H4
C2H4 (ethylene) will undergo an addition reaction. Addition reactions involve the breaking of a double or triple bond in a molecule and the addition of new atoms or groups to the resulting open sites. In the case of ethylene (C2H4), it has a double bond between the two carbon atoms, and this double bond can undergo an addition reaction with appropriate reagents. The double bond opens up, and new atoms or groups are added to the carbon atoms, resulting in a saturated product.