Dec 21 (Reuters) - Energy stocks dragged Canada’s main stock index at the open on Monday, as oil prices tumbled after coronavirus-led restrictions in Europe triggered concerns of a slower fuel demand recovery. * At 9:34 a.m. ET (1434 GMT), the Toronto Stock Exchange’s S&P/TSX composite index was down 198.54 points, or 1.13%, at 17,336.09. (Reporting by Amal S in Bengaluru; Editing by Amy Caren Daniel)