Suppose F.I.R. is not registered by the Station House Officer. What are the options that the…

If the Station House Officer refuses to register an FIR, the complainant may send the substance of the information to the Superintendent of Police under Section 173(4) of the Bharatiya Nagarik Suraksha Sanhita, 2023 (formerly s. 154(3) CrPC), or approach the Magistrate, who may order an investigation under Section 175(3) on an application supported by an affidavit, or take cognizance on a private complaint. Hence "Both (Approach Superintendent of Police) & (Approach Magistrate by filing Private Complaint)".