The man looked at the poor boy with contempt.

Answer: Option A

Disrespect : lack of respect or courtesy.
Pity : the feeling of sorrow and compassion caused by the sufferings and misfortunes of others.
Jealousy : the state or feeling of being jealous.
Concern : relate to; be about.
Contempt : the feeling that a person or a thing is worthless or beneath consideration.

Synonym of Contempt is Disrespect