Candid is to indirect as honest is to

The correct answer is C. truthful.

Candid means to be direct and honest, while indirect means to be vague or evasive. Honesty is the quality of being truthful and sincere, while untruthfulness is the quality of being dishonest or deceitful.

Option A, frank, is similar to candid in that it means to be direct and honest. However, frank can also mean to be blunt or outspoken, which candid does not necessarily mean.

Option B, wicked, is the opposite of honest. Wicked means to be evil or morally wrong.

Option D, untruthful, is also the opposite of honest. Untruthful means to be dishonest or deceitful.