Where are the liquor factories located in the state of Bihar?

• A. Siwan, Bettiah, Munger, Chhapra and Samastipur
• B. Nalanda, Rajgir, Hajipur, Muzaffarpur and Banka
• C. Bihar Sharif, Madhubani, Araria and Kishanganj
• D. Gopalganj, West Champaran, Bhagalpur and Riga