State whether a ∈ C, if {a} ⊂ A: i: A ⊆ B ii: B ⊆ C

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TestUstad · Accepted Answer

Statements (i) and (ii) together are sufficient. Option D is correct. The chain of relationships {a} ⊂ A, A ⊆ B, and B ⊆ C allows us to conclude that a ∈ C. Statements (i) and (ii) must be combined to establish this link. Options A, B, and C are incorrect because they do not utilize the full chain of subset relationships.

TestUstad · Answer

Statement (i) is sufficient

TestUstad · Answer

Statement (ii) is sufficient

TestUstad · Answer

Statements (i) and (ii) are each sufficient on their own

State whether a ∈ C, if {a} ⊂ A: i: A ⊆ B ii: B ⊆ C

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