Anguina balsamophila forms galls on

Answer: Option D

Anguina balsamophila forms galls on Leaf.
It is an ectoparasite that becomes endoparasitic invading inflorescence and developing seeds. It causes a disease called "ear-cockle", "gout" or seed gall on wheat and rye.
It does not infest oat, maize and sorghum. On wheat it causes stunted plants and distorted leaves. Seeds are transformed into galls which contain a dried mass of nematodes.