The current through a $4 / 3 \Omega$ external resistance connected to a parallel combination of two cells of 2 V and 1 V emf and internal resistances of $1 \Omega$ and $2 \Omega$ respectively is _______.

Fill in the blank with the correct answer from the options given below.

5/6 A

$ \xi = \frac{\xi_1 r_2 + \xi_2 r_1}{r_1 + r_2} = \frac{5}{3} V$

$I = \frac{\xi}{R} = \frac {\frac{5}{3}}{\frac{4}{3} + \frac{2}{3}} = \frac{5}{6}A$

The correct answer is Option (4) → 5/6 A