The traditional attire of Lepcha women is known as:

The correct answer is: b) Mekhela.

A Mekhela is a traditional garment worn by women of the Nepali ethnic group of the Lepcha people. It is a long, pleated skirt that is worn with a blouse and a shawl. The Mekhela is typically made of cotton or wool, and it is decorated with embroidery or appliqué.

The other options are incorrect because:

• Dumdyam is a traditional garment worn by men of the Lepcha people. It is a long, loose-fitting shirt that is worn with a pair of trousers.
• Salwar Kameez is a traditional garment worn by women of the Punjabi ethnic group. It consists of a pair of loose-fitting trousers (salwar) and a long, loose-fitting shirt (kameez).
• Sari is a traditional garment worn by women of the Indian subcontinent. It is a long, unstitched piece of cloth that is wrapped around the body and draped over the shoulder.