The correct answer is: c) Palm leaves.
Sanchipaat is an ancient art form of Assam that involves writing and illustrating on palm leaves. The leaves are first treated with a special paste to make them smooth and durable. Then, they are inscribed with letters and images using a stylus. The finished Sanchipaat scrolls are often used as religious texts or as works of art.
Option a) is incorrect because specially treated bark is not used in Sanchipaat.
Option b) is incorrect because cotton cloth is not used in Sanchipaat.
Option d) is incorrect because bamboo strips are not used in Sanchipaat.