Question

Which city is closest longitude to that of delhi?

Answer 1

Rajesthan is very closest to delhi

Answer 2

The question is incomplete.

However,

Longitude:  Longitudes are lines that are a measurement of distance that extends from the North Pole in the north to the South Pole in the south.

They are imaginary lines that are known as meridians.

Since the longitude runs from the north to the south, the city Bangalore is much closer in distance longitudinally.

The other cities are closer when the distance is calculated but are not closer when compared to the longitudinal distance to Bangalore.  

The longitude 77.216721 passes through Delhi and connects Bangalore.