Below a word is given in three sentences. Find out which one/ones make/makes a correct usage of the given word and mark the option accordingly. If the sentences are all correct mark option 5 as the answer.
Light
A. She turned on the light to read the book.
B. He carried a light bag during the trip.
C. He tried to light his habit of eating junk food by switching to healthier options.

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.