डेगाना किस खनन के लिए जाना जाता है?

Step 1: Identify the question. The question asks: "डेगाना जिस खनन के लिए जाना जाता है?" (Degana is known for which mining?)

Step 2: Evaluate the options. (अ) लोहे अयस्क (Iron ore) (ब) टंगस्टन (Tungsten) (स) कोयला (Coal) (द) तांबा (Copper)

Step 3: Determine the correct answer. Degana, located in Rajasthan, India, is historically known for its tungsten mines.

The correct option is (ब).

The answer is $\boxed{टंगस्टन}$.