For the circuit shown in the figure, the current I is

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For the circuit shown in the figure, the current I is

1. indeterminable due to inadequate data
2. zero
3. 4 A
4. 8 A

Correct Option: D

Redrawing the circuit, we have

From the circuit, V = 2RI ....(i)
and, V = (3R)4 + (4R). 1 = 16 R ....(ii)
From equations (i) and (ii), we get I = 8A