Rupee at 3-week low, breaching 55/dollar, on continued disappointment after RBI keeps rates on hold. Pair rises to 55.0550, highest since Nov. 29; now at 54.98/99 versus 54.84/86 last close. Senior dealer says exporters are holding back dollar sales at at time of strong dollar demand, pushing up USD/INR. Rupee may extend weakness to 55.50/dollar, adds dealer. "It will need RBI to provide dollar supplies or take out the oil demand from the market to drive rupee back into 54.60-54.10," he adds.

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