Whereas an educated man is an asset to society, an ignorant man is a liability. (make it compound)
A In spite an educated man is an asset to society, an ignorant man is a liability.
B An educated man is an asset to society but an ignorant man is a liability.
C An educated man is an asset to society and an ignorant man is a liability.
D An educated man is an asset to society or an ignorant man is a liability.