Question

Match List-I with List-II

Choose the correct answer from the options given below:

• A. (A)-(II), (B)-(IV), (C)-(I), (D)-(III)
• B. (A)-(I), (B)-(II), (C)-(III), (D)-(IV)
• C. (A)-(I), (B)-(II), (C)-(IV), (D)-(III)
• D. (A)-(III), (B)-(IV), (C)-(I), (D)-(II)

Hint:

Mobile nutrients (N, P, K, Mg) show deficiency symptoms first on older leaves. Immobile nutrients (S, Fe, Mn, Cu) show symptoms first on younger leaves. This mobility rule simplifies diagnosing nutrient deficiencies.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Nutrient deficiency symptoms are determined by the physiological role of the nutrient and its mobility within the plant.

Step 2: Detailed Explanation:
- Nitrogen (A): Highly mobile in plants. Under deficiency, nitrogen is translocated from older tissues to younger growing points, causing chlorosis to appear first on older leaves, starting from the leaf tip and moving inward in a characteristic V-shape. This matches (II).
- Phosphorus (B): Mobile in plants. Deficiency leads to an accumulation of anthocyanin pigments, giving older leaves and stems a dark green, purple, or reddish color. This matches (IV).
- Potassium (C): Highly mobile. Deficiencies lead to marginal scorching, necrosis, and mottling starting at the margins of older leaves. This matches (I).
- Sulphur (D): Relatively immobile in plants. Deficiency symptoms (uniform chlorosis) appear first on the younger leaves, as sulphur cannot be easily remobilized from older leaves. This matches (III).

Step 3: Final Answer:
The correct matching sequence is (A)-(II), (B)-(IV), (C)-(I), (D)-(III).