Interstate sale transaction - query

Facts: We are registered under Karnatak, Westbengal and Mahrashtra in India. Now we are buying some material from Andhrapradesh against Form C for customer located in maharashtra. We are buying this consignment specifically for the customer in maharashtra and movement of goods will be from Andhrapradesh directly delivered to customer location in maharashtra.

Qurery: Can We sale our customer on CST against form C from our Karnatak or Westbengal VAT TIN.