Question

Deficiency symptoms of Mn include
(A) Veins of leaves remain green (B) Mostly older leaves are affected (C) Chequered appearance (D) Pahala blight of sugarcane
Choose the correct answer from the options given below:

• A. (A), (B) and (D) only.
• B. (A), (C) and (D) only.
• C. (A), (B) and (C) only.
• D. (B), (C) and (D) only.

Hint:

Manganese is an immobile nutrient, so deficiency symptoms show on newer growth.

Answer 1

The Correct Option is B

Manganese deficiency shows up as interveinal chlorosis, where the tissue between leaf veins turns yellow while the veins themselves stay green (A), which often gives the leaf a chequered or mottled look (C). In sugarcane specifically, this same deficiency is given its own name, "Pahala blight" (D).
Because manganese doesn't move easily within the plant once it is taken up, deficiency symptoms show up first on the younger leaves, not the older ones, which is why statement (B) is wrong.
That leaves (A), (C) and (D) as correct, matching option 2.