Writ Petition With Mixed Grounds- Reg

How would a Writ Court adjudicate if a Writ petition (Certiorarified Mandamus) has three types of grounds (all are defects of Natural Justice particulars) of which Type 1: a few grounds readily verifiable from case the records (error apparent on the face of the records nature); Type 2: a few grounds that require orders from the court to the opposite party (quasi-judicial body) compelling it to submit some evidences regarding the appointment of one of its members (notifications/procedure of appointment/ orders etc., related to that particular member); and Type 3: A few other procedural defects ground that might require more investigation and fact-finding, including cross-examination of some of the opposite parties, if necessary. How will the adjudication happen in this type of Writ petition having mixed grounds pleadings? NOTE: Looking for answers from advocates. Appealed not to post ChatGPT or other auto-generative app generated answers.