Explanation

Chlorosis is the correct term for the yellowing or paling of green plants due to lack of chlorophyll. Chromoplasts are plastids that store pigments other than chlorophyll and are not the condition itself. Leucoplasts are colorless plastids used for storage and do not describe the symptom. Since option A and D are duplicates, they are incorrect because they refer to a pigment-storing organelle, not the condition.