If TP of employing one unit of variable factor is 12 units and that of 2 units of variable factor is 16 units, the marginal product of 2 units of variable factor is :

If TP of employing one unit of variable factor is 12 units and that of

1.	If TP of employing one unit of variable factor is 12 units and that of 2 units of variable factor is 16 units, the marginal product of 2 units of variable factor is :
Answer» 3 units 4 units 8 units 16 units Answer :B