Question

Match LIST-I with LIST-II 

LIST-I (Biocontrol)		LIST-II (Example)
A.	Bacterium	I.	Bacillus thuringiensis
B.	Fungus	II.	Clostridium
C.	Insect	III.	Trichoderma
D.	Biopesticide	IV.	Cotton aphid

Choose the correct answer from the options given below: 
 

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

Hint:

In matching questions, identify the most certain pairs first. Here, Fungus \(\rightarrow\) {Trichoderma} and Biopesticide \(\rightarrow\) {Bacillus thuringiensis} toxin are classic examples. Use these to narrow down your options.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
This question requires matching different categories of biocontrol agents or related terms with specific examples.
Step 2: Detailed Explanation:
Let's analyze each pair to find the best match, assuming each example is used only once. B. Fungus: The most direct match is III. {Trichoderma}, which is a well-known genus of fungi used as a biocontrol agent against fungal plant pathogens. So, B matches III.
D. Biopesticide: A biopesticide is a pest control product derived from a natural source. The insecticidal toxin produced by I. {Bacillus thuringiensis} is the most famous example of a biopesticide. So, D matches I.
A. Bacterium: With B. thuringiensis already assigned, we look for another bacterium. II. {Clostridium} is a genus of bacteria. So, A matches II.
C. Insect: The remaining example is IV. Cotton aphid, which is an insect (though a pest, not a biocontrol agent, it is the only insect listed). So, C matches IV.
This gives the combination: A-II, B-III, C-IV, D-I.
Step 3: Final Answer:
Based on the process of elimination and direct matching, the correct combination is A-II, B-III, C-IV, D-I.