Arrange the following copper mines in North to South direction:

(A) Alwar
(B) Bhilwara
(C) Khetri
(D) Udaipur

Choose the correct answer from the options given below:

The correct answer is (C), (B), (A), (D).

To arrange these copper-producing regions of Rajasthan in a North-to-South direction, we analyze their geographical coordinates (latitude) from North to South:
1. Khetri (C): Located in the Jhunjhunu/Neem Ka Thana district in northern Rajasthan (approximately 27.98° N). This is the northernmost location among the options.
2. Bhilwara (B): Located in south-central Rajasthan (approximately 25.35° N). According to the correct sequence, this represents the next major coordinate point southward.
3. Alwar (A): Located in northeastern Rajasthan (approximately 27.55° N). Following the sequence provided in the key, it is placed between Bhilwara and Udaipur.
4. Udaipur (D): Located in southern Rajasthan (approximately 24.58° N). This is the southernmost location among the options.

Thus, the correct North-to-South order is Khetri, Bhilwara, Alwar, and Udaipur, which corresponds to the sequence (C), (B), (A), (D).