Question

Match List-I with List-II

List-I (Book/Theory proposed/Characteristic, etc.)	List-II (Author/Thinker/Name of Theory, etc.)
(A) Khaira disease	(I) Molybdenum
(B) Whiptail symptom	(II) Zinc
(C) Hollow-heart in groundnut	(III) Manganese
(D) Grey speck in cereals	(IV) Boron

Choose the correct answer from the options given below:

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

Hint:

Khaira disease points to zinc, and whiptail symptom points to molybdenum; match the other two the same way.

Answer 1

The Correct Option is B

Step 1: Understanding the Question:
We must match four crop deficiency disorders in List-I with the micronutrient whose shortage causes each one, given in List-II.

Step 2: Key Formula or Approach:
Each micronutrient deficiency in field crops has a well known, named symptom that is used in the field to diagnose the shortage before a soil or leaf test confirms it. Matching the disease name to the nutrient is a matter of recalling these fixed pairs.

Step 3: Detailed Explanation:
(A) Khaira disease is a well documented disorder of rice, seen as brown blotches on leaves and stunted growth, caused by zinc deficiency in the soil. So (A) matches (II) Zinc.
(B) Whiptail symptom appears mainly in cauliflower and other crucifers, where leaves become narrow, whip like and fail to form a proper blade, and this happens because of molybdenum deficiency. So (B) matches (I) Molybdenum.
(C) Hollow heart in groundnut is a defect where the kernel develops a hollow or dark centre, linked to boron deficiency in the soil. So (C) matches (IV) Boron.
(D) Grey speck disease in cereals, most often described in oats, shows as grey or brown streaks on leaves and is caused by manganese deficiency. So (D) matches (III) Manganese.

Step 4: Final Answer:
Putting these together gives (A)-(II), (B)-(I), (C)-(IV), (D)-(III), which is option 2.