Option 1) 1
Option 2) 2
Option 3) 4
Option 4) 8
A set A is said to be a subset of a set B if every element of A is also an element of B.
It is represented by . eg. A B if A={2,4} and B= {1,2,3,4,5}
The subsets formed from the given set are ,{5},{7},{5,7}
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