Correct Answer: Cynosure

Solution : The second option is correct.

The phrase one who is a centre of attraction refers to someone who draws or garners a lot of attention or interest from others.

Cynosure : It refers to a person or thing that is the centre of attention or admiration.

The meanings of the other options are:

Exposure: It refers to being subjected to or experiencing something, whether it's an idea, culture, environment, or other influences.

Commissure: The term commissure generally refers to a point of union or junction where two structures come together. It is often used in anatomical and biological contexts.

Censure: The term is often used in the context of formal condemnation or reproach, and it implies a judgement of wrongdoing or fault.

Therefore, the correct answer will be cynosure.