Concept:The word 'candid' means truthful, straightforward, and open. Its antonym is the opposite: dishonest or deceitful.
Explanation:- 'Candid' refers to being honest and direct in speech or expression.
- 'Deceitful' means being dishonest, misleading, or not truthful — this is the exact opposite.
- Option B 'Blunt' means straightforward, often rudely direct – it is similar to candid, not opposite.
- Option C 'Honest' is a synonym of candid, so it cannot be its antonym.
- Option D 'Frank' also means open and sincere, again a synonym.
- Hence, only 'Deceitful' is the correct antonym.
Answer:A. Deceitful