Below a word is given in three sentences. Find out which

Solution

Sentence A : "She turned on the light to read the book." — Correct usage of "light," referring to an electrical device that produces illumination.
Sentence B: "He carried a light bag during the trip." — Correct usage of "light," meaning something that is not heavy.
Sentence C : "He tried to light his habit of eating junk food by switching to healthier options." — Incorrect. "Light" in this context is misused; it should refer to making something ignitable or illuminating, not altering a habit.