(1)->a-b=4

if a=5 and b=1 then 5-1=4, there will be 3 integers such that a > n > b. i.e {2,3,4}

if a=-1 and b=-5 then (-1)-(-5) = 4 thus there will be 3 integers such that a > n > b. i.e {-2,-3,-4}

but if a= 4.5 and b=0.5 then there will be 4 integer values on the number line between 0.5 and 4.5 i.e. {1,2,3,4}

we get 2 different answers so NOT SUFFICIENT.

(2)--> a and b are not integers.

clearly not SUFFICIENT as there can be any number of integer values between a and b depending upon the values of a and b

if a=2.5 and b = 1.5 then there will be only one integer {2} such that a > n > b.

if a= 4.5 and b=0.5 then there will be 4 integer values on the number line between 0.5 and 4.5 i.e. {1,2,3,4}

Combining both statements

For any non integral values of a and b such that a-b=4 , there will always be 4 integers such that a > n > b.

Thus [C].

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