A solar day is the time it takes for the Earth to rotate about its axis so that the Sun appears in the same position in the sky.
The sidereal day is the time it takes for the Earth to complete one rotation about its axis with respect to the ‘fixed’ stars.
1 complete rotation of Earth around its axis takes 23 hours, 56 minutes and 4.1 seconds
Sidereal day is also 23 hours, 56 minutes and 4.1 seconds by definition.
Study 40% syllabus and score up to 100% marks in JEE