Which of the following is not a type of silk?

(a) Moth silk

(b) Mooga silk

(c) Tassar silk

(d) Mulberry silk

The correct answer is (a) Moth silk.

Explanation

While all silk is produced by the larvae (silkworms) of moths, "Moth silk" is not a specific commercial type or classification of silk. It's a general, descriptive term.

The other options are all well-known, distinct varieties of silk:

• Mulberry silk: This is the most common and commercially popular type of silk. It's produced by the larvae of the Bombyx mori moth, which are fed exclusively on mulberry leaves.
• Mooga silk: This is a wild silk from Assam, India, famous for its natural golden sheen. It's produced by the Antheraea assamensis silkworm.
• Tassar silk: This is another type of wild silk produced by silkworms that feed on various plants, giving it a rich texture and natural deep gold colour.

Therefore, Mulberry, Mooga, and Tassar are specific types of silk, whereas "Moth silk" is not a recognized category.