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Let a(1) , a(2) ...... A(50) are non con...

Let `a_(1) , a_(2)` ...... A_(50)` are non constant terms of an `A.P`. And sum of `n` terms is given by `S_(n)=50n+(n)(n-7)(A)/(2)`., then ordered pair `(d, a_(50))` is (where `d` is the common difference)

A

(A,45A)

B

`(A,50+46A)`

C

`(2A,46A)`

D

`(2A,50+49A)`

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The correct Answer is:
B
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