The correct answer is option 2 - 2 only.
Explanation:
1. The first statement, which says that it was written by Raja Rammohan Roy, is incorrect. The "Barnaparichay" was actually written by Ishwar Chandra Vidyasagar, a prominent Bengali educator and social reformer, in the mid-19th century.
2. The second statement, which says that it was the most widely used Bengali primer of the time, is correct. "Barnaparichay" was indeed a widely used Bengali primer during that period. It was specifically designed to help children learn the Bengali alphabet and basic vocabulary.
Therefore, only statement 2 is correct.