hello friends,
You are asked the right question three months is sufficient if you are thinking i can.
For problematic parts icai practice manual and rtp are important if you practice thoroughly you will get good marks, for theory like law at the time of reading you pay more attention then only you get good knowledge in law. For IT and SM plan this subjects read for every day and understand the meanings and prepare your own notes for IT and SM.And once you read the examiners observations it will help more to you.
All the best for your exams.