Question

Match List-I with List-II:

Choose the correct answer from the options given below:

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

Hint:

Common vegetable diseases and their hosts:
Purple blotch: Garlic, Onion (Alternaria porri)
Black rot: Cauliflower, Cabbage (Crucifers - Xanthomonas campestris)
Anthracnose: Chilli, Beans, Mango (Colletotrichum spp.)
Powdery mildew: Pea, Cucurbits, Grapes (Many hosts, various fungi)

Answer 1

The Correct Option is A

We need to match common plant diseases with the vegetable crops they typically affect.
(A) Purple blotch: Caused by the fungus Alternaria porri, this is a significant disease of Allium species, including onion and Garlic (I).
(B) Black rot: Caused by the bacterium Xanthomonas campestris pv. campestris, this is a major disease of cruciferous vegetables like cabbage, broccoli, and Cauliflower (II).
(C) Anthracnose: Caused by fungi of the genus Colletotrichum, anthracnose affects a wide range of crops. It is a serious disease of Chilli (III), causing fruit rot and leaf spots.
(D) Powdery mildew: Caused by various species of erysiphaceous fungi, this disease appears as a white powdery coating on leaves and other plant parts. It is a common and widespread disease affecting many crops, including Pea (IV) (Erysiphe pisi). Therefore, all the direct matches are correct: (A) - (I) (B) - (II) (C) - (III) (D) - (IV) This corresponds to option (1). (A) - (I), (B) - (II), (C) - (III), (D) - (IV)

Answer 2

Pathogen-type approach:
Group the diseases by the kind of organism that causes them before matching crops. Purple blotch (A) and Anthracnose (C) are both fungal diseases: purple blotch, caused by Alternaria porri, is a signature disease of Allium crops such as garlic, giving (A)-(I); anthracnose, caused by Colletotrichum species, is a major fruit-rot disease of chilli, giving (C)-(III). Black rot (B), caused by the bacterium Xanthomonas campestris pv. campestris, is specific to cruciferous vegetables such as cauliflower, giving (B)-(II). Powdery mildew (D), caused by Erysiphe pisi, is the classic mildew of pea, giving (D)-(IV). This pathogen-first grouping arrives at the same direct matching, (A)-(I), (B)-(II), (C)-(III), (D)-(IV).