If zero is in A but not in B, the sets are:
ANot finite
BNot nested
CNot equal
DNot empty
Answer & Solution
Correct answer: C. Not equal
1. Equality needs identical membership.
2. A single mismatch is enough to break it.
3. Since 0 is in A and not in B, A and B are not equal sets.
4. So the answer is not equal.
_Source: NCERT Class XI Mathematics, Ch 1 'Sets'_
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