Correct Answer: Representative

Solution : The correct choice is the first option.

A delegate refers to a person chosen or elected to represent others or act on their behalf. The word representative describes a person or thing that represents another or others, often in an official capacity. It aligns closely with the idea of acting on behalf of a group or constituency, making it a suitable synonym for "delegate" in this context.

The meanings of the other words are:

• Serviceman: This typically refers to a person who is in the military or armed services.
• Elect: This usually means to choose or select someone for a position through voting.
• Exemplar: This refers to a typical or representative example of something.

Therefore, the right answer is, representative.