Which one of the following statements is correct regarding the elements and subsets of the set

Question

Answer 1

option B as {1,2} will be the subset of given set

Comments

Akriti sood  : Mam, why not option (C) 

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pls dun call me mam..:)

and C is nt the answer because {1,2,3} is nt the subset of {1,2,{1,2,3}}.

instead {{1,2,3}} is the subset of {1,2,{1,2,3}}

clear now??

Answer 2

Option A is correct

https://en.wikipedia.org/wiki/Element_(mathematics)

Comments

I think option A is correct

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Yes you are correct @shivanisrivarshini