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The sum of n terms of two arithmetic pro...

The sum of `n` terms of two arithmetic progressions are in the ratio `(3n+8):(7n+15)dot` Find the ratio of their 12th terms.

A

`7:16`

B

`16:7`

C

`7:9`

D

None of these

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STATEMENT-1 : The sum of n terms of two arithmetic progressions are in A.P. in the ratio (7n + 1) : (4n + 17) then the ratio n^(th) terms is 7 :4 and STATEMENT-2 : If S_(n) = ax^(2) + bx = c , "then" T_(n_ = S_(n) - S_(n-1) .