The correct answer is option 4. Article 32 of the Constitution of India provides remedies to citizens for the enforcement of fundamental rights. It is indeed a part of fundamental rights, as mentioned in option 2. Option 3 is also correct as the Supreme Court cannot refuse a writ petition under Article 32 on the ground of delay. However, option 4 is not correct because protection under Article 32 applies only to the enforcement of fundamental rights and not to the enforcement of ordinary law that does not relate to fundamental rights.

Therefore, the correct statement is that the protection under Article 32 does not apply to the enforcement of ordinary law that has nothing to do with fundamental rights. It is important to note that Article 32 is considered a fundamental right itself and plays a crucial role in safeguarding citizens` rights.