In the network shown in the figure potentials at points A, B, C and D are 5V, 10V, 20V and 30V respectively and the resitance $R_1, R_2, R_3$ and $R_4$ are 5Ω, 10Ω, 20Ω and 40Ω respectively. What is the current in the resistance $R_1$?

1A towards O 1A away from O 2A towards O 2A away from O

1A away from O

The correct answer is Option (2) → 1A away from O