Q.Silk is obtained from ….
a. Laccifer lacca
b. Nosema bombycis
c. Attacus ricini
d. Attacus mylitta

Sericulture is the commercial production of silk through silkworm rearing, an agro-based industry with three linked components: cultivating the silkworm's food plant, rearing the silkworms, and reeling/spinning the resulting silk. India produces all four commercial silk types from four different silk-moth species, each tied to a specific food plant and set of producing states — Mulberry silk (Bombyx mori, on mulberry, by far the largest share), Tasar silk (Antheraea mylitta, on Arjun), Eri silk (Attacus ricini, on Castor) and Muga silk (Antheraea assamensis, on Champa) — and ranks second in the world in silk production behind China. Bombyx mori's short-lived, flightless adult mates once, lays 400–500 eggs, and the resulting caterpillar moults through five instars over about three weeks before spinning a cocoon from roughly 1,000–1,200 metres of continuous silk thread secreted through its spinneret; growing its mulberry food is called moriculture, and rearing ta …