The power in a 3phase circuit is measured with the help of 2 wattmeters. The reading of one of wattmeters is positive and that of the others is negative. The magnitude of readings is different. It can be concluded that the power factor of the circuit is 

(A) Unity (B) 2 (lagging) (C) 5 (lagging) (D) Less than 0.5 (lagging)
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