A transformer having efficiency of 90 % is working on 200 V and 3 kW power supply. If the current in the secondary coil is 6 A, the voltage across the secondary coil and the current in the primary coil respectively are :-

1. A. 300 V, 15A
2. B. 450 V, 15A
3. C. 450V, 13.5A
4. D. 600V, 15A

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