Indicate the wrong pair among the following:

Now, we check each options.

Option (a): Kashmir - Saffron

Kashmir is famous for high-quality saffron cultivation, especially in Pampore.

Option (b): Khetri - Iron

Khetri, located in Rajasthan, is known for Copper mining, not Iron.

Option (c): Surat-Diamonds

Surat, in Gujarat, is globally known for its diamond cutting and polishing industry.

Option (d): Moradabad - Brass

Moradabad, in Uttar Pradesh, is famously called the B​rass City of India.

So, wrong pair is Khetri - Iron.

Thus, correct option is (b).