defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Mathematics Sets Set Theory and types of Sets

यदि A = {a, b} तो A का घांत समुच्चय निम्न में से कौन सा है?

1
{ϕ, {a}, {b}}
2
{ϕ, {a}, {b}, {a, b}}
3
{ϕ, {a}, {a, b}}
4
इनमें से कोई नहीं
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