Timing rule: a complete perineal tear is repaired straight away only if it is fresh, within 24 hours of delivery. After that window the local tissue turns oedematous and infected, and any immediate stitch will simply give way.
This patient arrives at 2 weeks, well past 24 hours, so options 1, 2, and 3 (immediate, 3-week, and 6-week repair) are all too early because the area is still not surgically clean. You first control infection with antibiotics, let the wound granulate, and wait for the tissues to become supple and healthy again.
That maturation takes roughly 3 months, which is why definitive delayed repair of a neglected complete tear is scheduled at 3 months. Hence option 4. Ref: Dutta Obstetrics.