Classification — collective nouns: choose the pair that is NOT a standard “animal : collective” match.

Introduction / Context:
Three pairs show conventional animal collectives. One pair uses a crowd term for unruly people, not a standard collective noun for a species.

Given Data / Assumptions:

• Fish : Shoal (or “school”) → standard.
• Cow : Herd → standard.
• Sheep : Flock → standard.
• Man : Mob → “mob” is a disorderly crowd; not a fixed zoological collective like the others.

Concept / Approach:
Check whether the right-hand word is the recognized collective noun for the left-hand species/class.

Step-by-Step Solution:

Verification / Alternative check:
Lexicon or dictionaries list herd, flock, shoal as conventional collectives; “mob” lacks species specificity.

Why Other Options Are Wrong:
They are textbook examples of collectives.

Common Pitfalls:
Assuming any group term counts; in reasoning, conventional pairings matter.

Final Answer:
Man : Mob