What is the correct relationship between coordinates and time in the context of India's size?

Correct answer: Longitudes affect local time

The governing concept is that local solar time changes primarily with longitude. Earth rotates from west to east, so locations at different longitudes face the Sun at different moments. The standard relationship is approximately 1 hour for every 15 degrees of longitude, or 4 minutes for each degree. Thus India's east-west longitudinal extent can produce local-time differences, even though the country uses one standard national time for practical administration. Option A is correct. Latitude mainly expresses north-south position and influences climate, but it does not directly establish clock time. Area and coastline are measurements or geographic features, not time standards.