If alpha and beta are the zeros of the p...

If `alpha` and `beta` are the zeros of the polynomial `p(x) = 2x^(2) + 5x + k` satishfying the relation `alpha^(2) + beta^(2) + alpha beta = 21/4` then k = …………

A

1

B

`2/7`

C

2

D

`3/2`

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