Ipcc presentation ???

Just have a look at Suggested answers given by ICAI. Your expected to answer questions in the same manner.

Quality of answers and not the quantity is what matters.

You may also come across circumstances when a question is asked for 5 marks and the same is asked for 16 marks in some other attempt (used to happen in our times, dont know whether the same happens now)

When you get a question for say 8-10 marks and you feel the answer cannot be too long, then just write what is required. Be careful not to beat around the bush ( a practice widely adopted in undergraduate examinations). Write to the point answers. Rather give examples if possible. 

Hi bro. you can refer the following articles published at Caclubindia:

Tips for writing theory answers

Get high in theory subjects with simple tips

even if u the search box on top right corner u will get many results in articles and forum section.

All the best..