A 220 volt input is supplied to a transformer. The output circuit draws a current of 2.0 ampere at 440 volts. If the efficiency of the transformer is 80%, the current drawn by the primary windings of the transformer is –

Question

( A ) 2.5 ampere
( B ) 3.6 ampere
( C ) 5.0 ampere
( D ) 2.8 ampere