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Let set `S` consists of all points `(x ,y)` satisfying `9x^2+16 y^2lt=144.` For points in S let maximum and minimum value of `(y-4)/(x-9)` be `Ma n dm` respectively, then
(a) `M=1`
(b) `M=(65)/7`
(c) `m=1`
(d) `m=7/(65)`

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