As we know that ,
Zoom is to rise fast and sharply. Plummet is to downside very fast, soothe is to make someone or something calm. Refute is to deny or contradict, subjugate means to bring under control.

Correct Option: B

As we know that ,
Zoom is to rise fast and sharply. Plummet is to downside very fast, soothe is to make someone or something calm. Refute is to deny or contradict, subjugate means to bring under control.
Therefore , Plummet is an opposite word of Zoom .

As we know that ,
Equivocal means doubtful or ambiguous, clear will be opposite to that, Quaint means strangely delightful.

Correct Option: C

As we know that ,
Equivocal means doubtful or ambiguous, clear will be opposite to that, Quaint means strangely delightful.
Hence , Clear is antonym word of Equivocal . Option C is correct .

As per the given above word , we can say that
Sequester is to isolate or confiscate and Unify means to bring together. Slump is a sudden fall down in an economy. Isolate will be a synonym to sequester.

Correct Option: C

As per the given above word , we can say that
Sequester is to isolate or confiscate and Unify means to bring together. Slump is a sudden fall down in an economy. Isolate will be a synonym to sequester.
Hence , Unify is an opposite word of Sequester .

As per the above given word , we can say that
Solicitous is someone who is anxious about a person’s welfare, concerned will be a synonym to solicitous. Indifferent is one who does not care, eager is full of desire.

Correct Option: B

As per the above given word , we can say that
Solicitous is someone who is anxious about a person’s welfare, concerned will be a synonym to solicitous. Indifferent is one who does not care, eager is full of desire.
Hence , Indifferent is an opposite word of Solicitous .

Cynical is a person who believes the motives and intentions of other people are always bad or evil, i.e., he always suspects, doubts mistrusts, as opposite to a trusting person. Gallant is very brave, brazen means shameless and Tiresome is long and tiring work.

Correct Option: A

As per the given above word , we can say that
Cynical is a person who believes the motives and intentions of other people are always bad or evil, i.e., he always suspects, doubts mistrusts, as opposite to a trusting person. Gallant is very brave, brazen means shameless and Tiresome is long and tiring work.
Therefore , Trusting is opposite word of Cynical .