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f p,q, r are +ve and are in A. P., in the roots of quadratic equation `px^2+qx+r =0 ` are real for A.` | (r/p)-7| >= 4sqrt(3)` B `| (p/r) -7| >= 4sqrt(3)` C. all p and r D. no p and r

A

`|r/p-7| ge 4sqrt(3)`

B

`|p/r-7| ge 4sqrt(3)`

C

all p and r

D

no p and r

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