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A  I and III

B  II and III

C I, II nd III

D  III only

in Set Theory & Algebra
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answer is option d.

i. it is a chain so eliminated.

ii. it contains 7 elements and P(S) contains 8 elements so eliminated.

iii. hasse daigram of P(S) = hasse daigarm of 3rd option. => it is isomorphic
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