Correct Option: C

The Shulba Sutras are sutra texts belonging to the Strauta ritual and containing geometry related to firealtar construction. They are part of the larger corpus of texts called the Shrauta Sutras, considered to be appendices to the Vedas. They are the only sources of knowledge of Indian mathematics from the Vedic period. The four major Shulba Sutras, which are mathematically the most significant, are those composed by Baudhayana, Manava, Apastamba and Katyayana.