Conjunctivitis affects which part of the eye?

• A. Cornea
• B. Pupil
• C. Lining of the eye
• D. Iris

Answer: (C)

Conjunctivitis primarily affects the conjunctiva, which is the thin, transparent membrane that lines the inner surface of the eyelids and covers the white part of the eyeball. This condition is an inflammation of the conjunctiva, leading to symptoms such as redness, itching, and discharge. Selecting the option that indicates the "lining of the eye" aligns directly with the definition and function of the conjunctiva.

The other parts of the eye mentioned, such as the cornea, pupil, and iris, are not involved in conjunctivitis. The cornea is the clear front part of the eye that helps focus light, the pupil is the opening that allows light to enter the eye and is not a lining but rather a hole in the center of the iris, and the iris is the colored part of the eye that controls the size of the pupil. Thus, the choice pinpointing the conjunctiva as the lining of the eye is clearly the most accurate characterization of what conjunctivitis affects.