Which among the following is NOT a Non-metallic mineral resource found in India?

Option 1 -> Mica is a non-metallic mineral extensively found in India, particularly in Jharkhand, Andhra Pradesh, and Rajasthan.

Option 2 -> Manganese is a metallic mineral used in steel production, not a non-metallic mineral. India has significant manganese deposits in Odisha and Maharashtra.

Option 3 -> Graphite is a non-metallic mineral (a form of carbon) found in India, mainly in Arunachal Pradesh, Tamil Nadu, and Jharkhand.

Option 4 -> Limestone is a non-metallic mineral abundantly found across India, used primarily in cement manufacturing.

Hence, Option 2: Manganese -> Manganese is classified as a metallic mineral resource, while the question asks for non-metallic minerals. The other three options (Mica, Graphite, and Limestone) are all non-metallic minerals found in India -> correct