The provision set out in the constitution to respect the lingual difference according to the different caste and community

Article 29 section 1 & 2 of Indian Constitution.

Explanation:

Under the Indian constitution, Article 29, section 1&2 is the provision set out in the constitution to respect the lingual difference according to the different caste and community.

This evident when it started that:

"(1) Any section of the citizens residing in the territory of India or any part thereof having a distinct language, script or culture of its own shall have the right to conserve the same.

(2) No citizen shall be denied admission into any educational institution maintained by the State or receiving aid out of State funds on grounds only of religion, race, caste, language, or any of them."

the answer is b, encourage free trade