First of all I'm still catching up with this weeks episodes so if something like this has been reveled please let me know 😊
1) Age wise if he went to university and became a doc he would be at lease 23/24 Trisha is 18 and prateek is probably around 50 so he could have been in college at 25, so the look of the character would be correct.
2) When Trisha was in hospital and Aditya was introduced I think he was the shooter but when his plan failed and people were on their way obviously he became the 'saviour'
3) if Varsha is taking revenge she would need inside information also and hurt prateek where it would hurt so I think this is her link if not son maybe just partner in crime
Would like to hear your thoughts too!