28. The value of k for which both the roots of the equation 4x^2 – 20 kx + (25 k^2 + 15 k - 66)=0 are less than 2,
lies in
(c) (-1, 4/5)
(d) (-infinity,-1)
(a) (4/5, 2)
(b) (0, 2)
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