Silk is often used in China. Silk is a very delicate kind of textile. (combine)

1. أSilk, whose is a very delicate kind of textile, is often used in China.
2. بSilk, which is a very delicate kind of textile, is often used in China.
3. جSilk, who is a very delicate kind of textile, is often used in China.
4. دSilk, where is a very delicate kind of textile, is often used in China.