Mumbai, Feb 21 (PTI) The US dollar inched up against the rupee at Rs 49.30/31 per dollar, but the Pound Sterling finished lower at Rs 77.89/91 per pound at the close of the Interbank Foreign Exchange market (Forex) here today. The Following are the Interbank Forex and RBI rates: (In Rs Per Unit) Unit Interbank RBI Reference US Dollar 49.30/31 US Dollar Rs 49.0835 Pound Sterling 77.89/91 Euro Rs 65.1705 Euro 65.12/14 Japanese Yen (100) 61.88/90 ---