Submission: Yielding::

1. Submission: This word refers to the act of yielding or surrendering to a higher authority or accepting the will or authority of another. It implies compliance or obedience.

2. Yielding: This word means giving way to pressure or force; surrendering or giving up one's position or opinion. It is closely related to submission as it denotes the action of conceding or acquiescing.

Now, let's analyze the options provided:

1. Subjection: Liberation: This pair represents the opposite relationship of submission and yielding. "Subjection" implies being under control or domination, whereas "liberation" signifies freedom or release from such control.

2. Restrain: Indulge: This pair represents a contrasting relationship, where "restrain" means to hold back or restrict, while "indulge" means to allow oneself to enjoy something freely.

3. Compliant: Acquiescent: These words represent a similar relationship to "submission: yielding." "Compliant" means inclined to agree with or obey rules, while "acquiescent" means accepting something reluctantly but without protest. Both suggest a willingness to yield or give in to a certain extent.

4. Restriction: Relaxation: This pair represents the opposite relationship of submission and yielding. "Restriction" implies a limitation or control, whereas "relaxation" signifies the absence of such limitations, suggesting freedom.

Given the definitions and relationships between the words, the pair that best mirrors the relationship between "submission: yielding" is:

গ. Compliant: Acquiescent

Because both terms imply a willingness to yield or give in to something, reflecting the relationship between submission and yielding.