The correct option is B loyalty
Infidelity means the action or state of being unfaithful to a spouse or other sexual partner. The opposite of infidelity is loyalty, or the quality of being loyal. Hence, Option A is correct. Among the rest of the options, innocence means the state, quality, or fact of being innocent of a crime or offence, intelligence means the ability to acquire and apply knowledge and skills, charity means an organization set up to provide help and raise money for those in need.These options do not express this antonym, hence incorrect.