If f(x)=sgn(cos 2x - 2 sin x + 3), where...

If `f(x)=sgn(cos 2x - 2 sin x + 3)`, where sgn () is the signum function, then f(x)

A

is continuous over its domain

B

has a missing point discontinuity

C

has isolated point discontinuity

D

has irremovable discontinuity

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The correct Answer is:

C

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