The correct option is B Machilus bomycina
The muga silkworm is the larva of the Assam silkmoth (Antheraea assamensis), a moth of the Saturniidae family. It is found in India (namely Assam) Burma and Sundaland. The larva feed on Machilus bomycina.
Its silk has a beautiful glossy golden hue, which improves with age and washing.