Correct option is A
The correct one-word substitution for "a child who stays away from school without leave or explanation" is (a) truant. • "
Truant" specifically refers to a student who stays away from school without permission or an acceptable reason. • Correct word: बंकमार (Truant in Hindi) • Use in a sentence: The school has implemented strict policies to deal with truants more effectively. •
Meanings of the given other options: •
Cynic - A person who believes that people are motivated purely by self-interest rather than acting for honorable or unselfish reasons. •
Martinet - A strict disciplinarian, especially in the armed forces. •
Acquiescent - A person who accepts something reluctantly but without protest.