The scheme proved harmful for the people, the middle income group in particular.

Answer: Option D

Particular : used to single out an individual member of a specified group or class.
Common : occurring, found, or done often; prevalent.
Usual : habitually or typically occurring or done; customary.
Specific : clearly defined or identified.
General : affecting or concerning all or most people or things; widespread.

Antonym of Particular is General