Answer:
B. Both have Marginal Revenue Curves below Demand Curve
Step-by-step explanation:
Monopoly ,Monopolistic Competition market structures are Imperfect Market Structures . So , unlike Perfect Competition (very large no of buyers selling same product at same price facing perfectly inelastic i.e horizontal demand /AR = MR curve), they both have normal downward sloping demand/AR curve (as per law of demand) & MR curve lies below it .
Monopolies are single seller of the product , the question of product differentiation does not arise . So , the other points are unvalidated