{a and b } subset of {a ,b,c,d,e,f}

Answer :
We know
Subset : ​A subset is a set contained in another set As " Set A is a subset of set B if all of the elements (if any) of set A are contained in set B. This is written A ⊂ B.

Here we have ​{a and b } subset of {a ,b,c,d,e,f}

we can see that a and in second set so , our state ment is true that " ​{a and b } subset of {a ,b,c,d,e,f} " .