The correct answer is option 1, Varanasi. "Tancho brocade" is a type of traditional handwoven fabric that originated in Varanasi, a city in the northern state of Uttar Pradesh in India. Varanasi has been a center for textile production for centuries, and it is known for its exquisite silk garments and textiles. "Tancho brocade" refers to a specific type of brocade fabric that is woven with gold or silver threads and intricate designs. Varanasi`s skilled artisans have mastered the art of creating this luxurious fabric, which is often used for making sarees and other traditional Indian garments. It is important to note that although Dhaka, Surat, and Tanjavur are all known for their textile industries, they are not associated with the development of "tancho brocade."