A pole zero pattern of a certain filter is shown in figure. This filter must be

1.

A pole zero pattern of a certain filter is shown in figure. This filter must be

25-416

[A].	LPF
[B].	BFP
[C].	HPF
[D].	APF

Answer: Option D

Explanation:

In transfer function, no of zeros = no. of poles, hence it is all pass fliter.

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