Synonym of VERNAL

Answer: Option C

Dirty : covered or marked with an unclean substance.
Luxuriant : (of vegetation) rich and profuse in growth; lush.
Springlike : typical of spring.
Prone : likely or liable to suffer from, do, or experience something unpleasant or regrettable.
Vernal : of, in, or appropriate to spring.

Synonym of Vernal is Springlike