Which of these districts produces silk worms in Bengal?

1. Kalimpong
2. Howrah
3. Cooch Behar
4. Darjeeling

Answer: Darjeeling

Explanation: Santipur and Fulia in Nadia district, Dhaniakhali and Begampur in Hooghly, Sanudragarh, Dhatrigam, and Ketugram in Bardhaman, and Bishnupur in Bankura are prominent centers for silk production in West Bengal. These locations have established themselves as key contributors to the silk industry. Additionally, the breeding centers for silk worms are situated in Malda, Darjeeling, Murshidabad, and Bardhaman, facilitating the cultivation and nurturing of silk worms for the production of silk.