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Let a(1), a(2), ……, a(n) be a given A.P....

Let `a_(1), a_(2), ……, a_(n)` be a given A.P. whose common difference is an integer and `S_(n)=a_(1)+a_(2)+………..+a_(n)`. If `a_(1)=1, a_(n)=300` and `15le n le 50`, then the ordered pair `(S_(n-4)'a_(n-4))` is equal to:

A

(2490, 248)

B

(2480, 248)

C

(2480, 249)

D

(2490, 249)

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