The current in resistance R3 in the given circuit is
Answer & explanation
Correct answer: option 2
Current through $R_1$ and $R_2$ comes out to be zero (potential difference = 0)
∴ Current through, $R_3=\frac{\text { Net emf }}{\text { Total resistance }}=\frac{(4+3+2)-(2+3+2)}{3}=\frac{2}{3} A$