What are the three meridians of longitude that cross the indian ocean

Longitude is an imaginary line that is measured from North to south the three meridians are 75th, 80, 90th meridian east.

Explanation:

Meridian of 80 degrees east passes through north pole across the arctic ocean and then crosses the Indian ocean and it also is seen in an eastern cafe in Nanganallur, Chennai is named after this longitude. Meridian that is 90 degrees east of Greenwich is the longitude that extends from the north pole towards the Indian ocean making the 90 east ridge a touching India in Assam and Meghalaya. The 75th east meridian which touches J&K, Punjab, and Rajasthan and then the Indian ocean from Kerala east of Greenwich.