Antonyms

Vapid means flat, insipid, tasteless; boring. It's antonym will be Piquant as it stimulates the interest (enticing) as well as the taste (tangy, spicy). Hence, (B) is the answer.

Purloin means to steal; filch reimburse means to repay or compensate (a person) for expenses, damages, losses, etc. Hence, (D) is the answer.

Labefaction means the act of labefying or making weak; the state of being weakened; decay; ruin. Sinew is any source of power or strength; means of supplying strength. Hence, (C) is the answer.

“Voluptuary” is a person elevated to luxury and the gratification of sensual appetites; sensualist. “Ascetic” is a person who leader a life of contemplation and rigorous self-denial for religious purpose; therefore the antonym for voluptuary. Hence, (D) is the answer.

Aspersion refers to the act of defaming; a damaging or disparaging remark; slander; innuendo whereas elogium means the praise bestowed on a person or thing; panegyric; eulogy. Hence, (D) is the answer.

Inerrable means not erring; infallible. Fallible means liable to be erroneous or inaccurate. Hence, (D) is the answer

“Chimera” is a fanciful mental illusion or fabrication. “Palpability” means that can be touched, felt or handled; tangible; therefore the antonym of chimera. Hence, (E) is the answer.

“Tetchy” means touchy; irritable; peevish. It's answer is (C) -“Cordial” ;meaning genial, warm, gracious.

“Salubrious” is favourable to health; promoting health; healthful. “Deleterious” is harmful to health or well-being; injurious; hence (B) is the answer.

Mansuetude is Gentleness of manner; mildness. Barbarity is cruel or brutal behavior; inhumanity. Hence, (C) is the answer.

Apropos means at the right time; opportunely; relevant or pertinent. Incongruous means mismatched / incompatible. Hence, (5) is the answer.

“Callow” means immature, lacking adult perception, experience, or judgement. It’s antonym would be suave, which means smoothly gracious or polite; polished; blandly ingratiating; urbane. Hence, (C) is the answer.

Traducement means to say untrue or malicious things about; defame; slander; vilify i.e. defamation of a person or thing. Apotheosis means the act of raising a person to the status of a god; deification i.e. Glorification of a person or thing, hence the antonym of Traducement. Hence, (D) is the answer.

Ribald means Characterized by or indulging in vulgar, lewd humor prudish means Ike or characteristic of a prude (a person who is overly modest or proper in behavior, dress, or speech); too modest or proper. Hence, (C) is the answer.

Debauch means to lead astray morally; corrupt; deprave. Conscientious means scrupulous, honest, and upright. Hence, (A) is the answer.