A voltmeter when connected across a DC supply, reads 124 V. When a series combination of the voltmeter and an unknown resistance X is connected across the supply, the meter reads 4 V. If the resistance of the voltmeter is 50 kΩ, the value of X is
1
1550 kΩ
2
1600 kΩ
3
1.6 kΩ
4
1.5 kΩ