Which of the following function(s) defin...

Which of the following function(s) defined at x = 0 has/have removable discontinuity at the origin ?

`f(x)=1/(1+2^(cotx))`

`f(x)=cos((|sinx|)/x)`

`f(x)=x"sin"(pi)/x`

`f(x)=1/(log|x|)`

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B, C, D

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