Which of the following is not caused by deficiency of mineral ?

Step-by-step solution

Chlorosis occurs due to the lack of ( Fe , Mg ). Necrosis occurs due to the lack of N, S, Mo. Shortening of internodes occurs due to lack of K. Whereas, etiolation is the phenomena which occur in plants not due to deficiency of any mineral element but when the plant is grown in partial or in the complete absence of light. It results in weak stems and loss of chlorophyll from the leaves. Thus the correct answer is option B.