A post without remuneration

Voluntary
Sinecure
Honorary
Involuntary

The correct answer is B. Sinecure.

A sinecure is a position that carries a title but little or no responsibility or work, especially one that is used to provide a salary or other benefit to someone without requiring them to do any actual work.

A voluntary position is one that is undertaken without pay or other form of compensation.

An honorary position is one that is given as a mark of respect or distinction, but does not carry any real power or responsibility.

An involuntary position is one that is held against one’s will.