mujhe samajh nhi aaya ki should aur ought to mein kya difference hai

“Should” and “ought to” are same and I’d say they pretty much mean the same thing (suggestions such as in advice). The real difference is “ought to” is an older version found more in writings from generations ago. Of course it’s still used today but I’ll venture to say that for the most part, it has been replaced by the newer modern “should”.