Explanation:

- Section 87 of the Criminal Procedure Code (CrPC) gives the power to issue a warrant.

- It allows issuing a warrant in lieu of a summons if someone is avoiding appearing in court or if it is evident that a summons would not suffice.

- It also permits issuing a warrant in addition to a summons if the court believes it is necessary.

- This section is flexible and accounts for both scenarios where a person might not comply with just a summons and needs to be compelled by a warrant.

Option 3: both (a) & (b) is correct.

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