In an electrical circuit, there are two batteries of emf 12 V and 6 V having internal resistance of 3Ω and 6Ω respectively, is connected with a resistance of 4Ω as shown in the figure. Find the current passing through 4Ω resistance.
(1) 0.6 A
(2) 1.9 A
(3) 1.67 A
(4) 1.2 A
