Synonym of REQUITE

Answer: Option B

Spare : additional to what is required for ordinary use.
Repay : do or give something as recompense for (a favour or kindness received).
Favour : approval, support, or liking for someone or something.
Punish : inflict a penalty or sanction on (someone) as retribution for an offence, especially a transgression of a legal or moral code.
Requite : return a favour to (someone).

Synonym of Requite is Repay