Answer : 3. "कामचीनी"
Explanation :

1. The famous art of Blue Pottery was earlier known as Chinese blue-and-white pottery. This is a famous type of porcelain in China which has been made since the 14th century. This type of porcelain is known for its blue decoration.

2. The art of Blue Pottery developed during the Yuan dynasty of China. During this time, Chinese artists began using a new type of cobalt blue for blue decoration. This colour gave the porcelain a unique and beautiful appearance.