In Figure 11.10, $R_1 = 3\,\Omega$ and $R_2 = 6\,\Omega$ are in parallel across 2 V. Current through $R_1$ is —

• a$\frac{1}{6}$ A
• b$\frac{1}{3}$ A
• c$\frac{2}{3}$ A
• d1 A