Among the following cities, which one lies on a longitude closest to that of Delhi?

The correct option is Bengaluru.

To determine which city lies on a longitude closest to that of Delhi, let us look at the approximate longitudes of the given Indian cities:

• Delhi: 77.10° E (approx. 77° 12' E)
• Bengaluru: 77.59° E (approx. 77° 35' E)
• Hyderabad: 78.48° E (approx. 78° 28' E)
• Nagpur: 79.08° E (approx. 79° 05' E)
• Pune: 73.85° E (approx. 73° 51' E)

Now, let us calculate the absolute difference in longitude between Delhi and each of the given cities:

• Difference for Bengaluru: |77.10° - 77.59°| = 0.49°
• Difference for Hyderabad: |77.10° - 78.48°| = 1.38°
• Difference for Pune: |77.10° - 73.85°| = 3.25°
• Difference for Nagpur: |77.10° - 79.08°| = 1.98°

Comparing these differences, Bengaluru has the smallest longitudinal difference (approx. 0.49°) from Delhi, which means it lies nearly on the same vertical meridian line as Delhi.

Therefore, Bengaluru is the city lying on a longitude closest to that of Delhi.