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Let alpha and beta be the roots of equat...

Let `alpha` and `beta` be the roots of equation `px^(2)+qx+r=0,p!=0`.If `p, q ,r ` are in A.P. and `((1)/(alpha)+(1)/(beta))= 4`, then the value of `| alpha -beta|`

A

`sqrt(61)/(9)`

B

`(2sqrt(17))/(9)`

C

`sqrt(34)/(9)`

D

`(2sqrt(13))/(9)`

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The correct Answer is:
D
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