The power delivered by 4V source

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Direction: 20 to Q. 25. For the circuit shown below—

The power delivered by 4V source—

1. 36W
2. – 36W
3. 60W
4. – 60W

Correct Option: A

From figure given in solution 21:
Current in branch BC is 9A. Since the current is entering at the negative terminal, therefore the power delivered by the 4V source is positive
P_delivered = VI = 4 × 9 = 36W