Correct Option (b):
Pair 2 is correctly matched. Odisha holds a substantial portion of India's nickel reserves, accounting for over 90% of the known deposits. The Sukinda Valley in Jajpur district is a significant area for nickel ore.
Incorrect Options:
Pair 1 (Copper - Jharkhand) is not correctly matched. Although Jharkhand (particularly the Singhbhum district) has copper deposits, the primary copper-producing states in India are Madhya Pradesh (Malanjkhand belt) and Rajasthan (Khetri belt).
Pair 3 (Tungsten - Kerala) is not correctly matched. Major tungsten deposits in India are predominantly located in Rajasthan (Degana, Sirohi) and also found in states like Maharashtra and West Bengal, rather than Kerala.