Silvery shoot or onion leaf symptom of rice tillers is caused by

Answer: Option B

Gall midge is a pest that attacks Rice plantations and infects the leaves of the paddy crop. It causes a tubular gall at the base of the tillers causing elongation of the leaf sheaths which resemble onion leaves that is why also called onion leaf or silvery shoot disease. It mainly attacks the rice in tillering stage and submerged the plantation.