Explanation:

The term "Minority" is not defined in the Indian Constitution. However, the Constitution recognises only religious and linguistic minorities.

• 6 Minority Communities in India: Jain, Parsi, Buddhist, Christian, Sikh and Muslim (notified by the Government).

Article 29: It provides that any section of the citizens residing in any part of India having a distinct language, script or culture of its own, shall have the right to conserve the same.

• It grants protection to both religious minorities as well as linguistic minorities. 

Article 30: Under the article, all minorities shall have the right to establish and administer educational institutions of their choice.

• The protection under Article 30 is confined only to minorities (religious or linguistic) and does not extend to any section of citizens (as under Article 29). 

Article 350-B: The 7th Constitutional (Amendment) Act 1956 inserted this article which provides for a Special Officer for Linguistic Minorities appointed by the President of India.

Hence only statement 3rd is correct.