In the circuit shown, current through $R_2$ is zero. If $R_4 = 2\,\Omega $ and $R_3 = 4\,\Omega $ , current through $R_3$ will be ................. $\mathrm{A}$
  • A$1.5$
  • B$5$
  • C$3.15$
  • D$3.5$
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