When n is the divisor, remainder ranges from 0 to (n-1)

Hence

(1).

n>4 means 1 through k would be

1,2,3,4,5 or

1,2,3,4,5,6... and so on and so forth.

So we know from above that the highest remainder when divided by 5 would be "4" and the lowest would be "0".

Hence Sufficient as range = highest remainder - lowest remainder = 4-0 = 4

(2).

1,2

1,2,3

Both the above have different ranges of remainder

Hence Insufficent

(A) It is !!

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Rgds,

TGC!

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