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Let f(x) =(x-1)^p.(x-2)^q where p > 1, q...

Let `f(x) =(x-1)^p.(x-2)^q where p > 1, q > 1.` Each critical point of `f(x)` is a point of extremum when

A

`p = 3`, `q = 4`

B

`p = 4`, `q = 2`

C

`p = 2`, `q = 3`

D

`p = 2`, `q = 4`

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