Step 1: Understanding the Concept:
This question tests knowledge of plant diseases and their causal organisms.
Step 2: Detailed Explanation:
Anthracnose (A):
Caused by Colletotrichum gloeosporioides (II).
Affects fruits (mango, papaya, citrus) and causes sunken lesions.
Thus, A matches with II.
Die-back (B):
Caused by Botryodiplodia theobromae (I).
Affects mango and other fruit crops.
Causes drying of twigs from the tip backward.
Thus, B matches with I.
Canker (C):
Caused by Xanthomonas campestris (III) - bacterial canker.
Citrus canker is a common example.
Thus, C matches with III.
Apple scab (D):
Caused by Venturia inaequalis (IV).
A fungal disease affecting apple fruits and leaves.
Thus, D matches with IV.
Step 3: Final Answer:
Thus, the correct matching is A-II, B-I, C-III, D-IV, which corresponds to option (B).
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