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whats ans of this qn and please explain 

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Here P(x,y) means that x is the divisor of y where x and y are the integers from the universe of discourse..

to make it simple let us say y=5 which is divisible by only 1 ,5.

                                            y=15 divisible by 1,3,5,15

we can say that 

every value of y will be divisible by some values of x..

or some x is only the divisor of all y.

now converting it to two place predicate...

xy P(x,y) means some x is divisor of all y.

or 

yxP(x,y) means all y is dividend of some x.

which means option B is the correct option (S2 and S3 is correct

 

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