Correct Option: A

Since voltage across 18 ohm resistance is 90 volts, hence current through 18 ohm resistance

=	90	= 5 A
	18

Equivalent resistance of 3 ohm and 6 ohm bank

=	3 × 6	= 2 ohms
	3 + 6

Since this 2 ohms resistance is in series with 18 ohm resistance, therefore Total resistance = 18 + 2 = 20 ohms
This 20 ohm resistance is in parallel with 5 ohm resistance

∴ Equivalent resistance =	5 × 20	= 4 ohms
	5 + 20

Hence total resistance of the circuit = 1 + 4 = 5 ohms. Current through this branch is 5 A
∴ Voltage across = 5 × 20 = 100 V = voltage across bc.
Hence, current through 5-ohm resistance

=	100	= 20 A
	5

∴ Total current through ab = 20 + 5 = 25 A. Since total resistance of the circuit is 5 ohm, therefore voltage, E = 25 × 5 = 125 V.