Prashant likes his friend, Rishabh inspite of his little frailties.

Answer: Option C

Weaknesses : the state or condition of being weak.
Oddities : a strange or peculiar person or thing.
Timidness : showing a lack of courage or confidence; easily frightened.
Failures : lack of success.
Frailties : weakness in character or morals.

Synonym of Frailties is Weaknesses