Major is related to Lieutenant in the same way as ’Squadron Leader’ is Related to _______ ?

The correct option is Flying officer.

This analogy compares the equivalent commissioned officer ranks of the Army and the Air Force.

Let us break down the rank equivalencies between the two military branches:
1. A Major in the Army is equivalent in rank to a Squadron Leader in the Air Force. Both serve as mid-level officers in their respective branches.
2. A Lieutenant in the Army is equivalent in rank to a Flying Officer in the Air Force. Both are junior commissioned officer ranks.

Following this equivalence, just as Major is related to Lieutenant (representing the higher rank to its corresponding junior rank), Squadron Leader must be related to Flying Officer.
Therefore, Squadron Leader is related to Flying officer in the same way Major is related to Lieutenant.