Question

Match List-I with List-II

Choose the correct answer from the options given below:

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

Hint:

Remember:
- Chenopodium album is an indicator of fertile, rich P and N soils.
- Chrysanthemum is an indicator of poor, K-deficient soils.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
Certain weed species are highly sensitive to soil nutrient levels and serve as biological indicators of nutrient excess or deficiency.

Step 3: Detailed Explanation:
Let us match the nutrients with their corresponding indicator weed species:
1. Phosphorus (P) (A): Chenopodium album (Lambsquarters) is highly responsive to nitrogen and phosphorus, flourishing in P-rich soils. Matches with (IV).
2. Potassium (K) (B): Chrysanthemum leucanthemum (Oxeye daisy) is a standard indicator for low potassium levels or acidic, K-deficient soils. Matches with (III).
3. Magnesium (Mg) (C): Chenopodium serotinum serves as an indicator species for magnesium status. Matches with (II).
4. Manganese (Mn) (D): Solanum nigrum (Black nightshade) is sensitive to trace mineral fluctuations, acting as an indicator for manganese. Matches with (I).
This gives the sequence: (A)-(IV), (B)-(III), (C)-(II), (D)-(I).

Step 4: Final Answer:
The correct option is 4, which corresponds to (A)-(IV), (B)-(III), (C)-(II), (D)-(I).