In the circuit of fig. shown below dependent source

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In the circuit of fig. shown below dependent source—

1. supplies 16 W
2. absorbs 16 W
3. supplies 32 W
4. absorbs 32 W

Correct Option: D

Since current i_x is enters at the positive terminal of the dependent source. It means power is absorbed by the dependent source, i.e.
P = V. i = 2i_x. i_x = 2 i²_x = 2.42 = 32 W (∵ i_x = 4 A)