Step 1: Understand the question.
We need the Article that stops state-funded schools and colleges from refusing admission on grounds of religion or language.
Step 2: Recall Article 29(2).
It says no citizen can be denied admission to a state-maintained or state-aided institution only on grounds of religion, race, caste or language.
Step 3: See its aim.
The clause gives everyone equal access to education and bans discrimination in admissions.
Step 4: Separate the others.
Article 28 is about religious instruction in schools, Article 30 lets minorities run their own institutions, and Article 39 is a Directive Principle.
Answer: Article 29 (Option 1).