The correct answer is (c), Gall midge.
Tungo virus is a plant virus that infects rice. It is transmitted by the gall midge, a small insect that feeds on rice plants. The virus causes the rice plants to produce galls, which are abnormal growths on the plant. The galls can damage the plant and reduce its yield.
Stem borer is a moth that attacks rice plants. It bores into the stems of the plants, which can kill the plants or reduce their yield. Gundhi bug is a small insect that sucks the sap from rice plants. It can damage the plants and reduce their yield. Green leaf hopper is a small insect that sucks the sap from rice plants. It can damage the plants and reduce their yield.
The gall midge is the only insect that is known to transmit Tungo virus. The virus is not transmitted by contact with infected plants or by seed.