Also these are two different questions here. For Nameer, its obviously at an advanced stage as the visa officer has raised an objection as per the thread title. 6 months' statement needs to be provided with no irregular credits and debits. These should ideally show an average and closing balance as per the minimum amount stated for the family size.
sam439's question is apparently pre-filling of a new application hence just a balance certificate would work as long as the money is not borrowed. Ideally though, a 6 month statement with the required amount would be the best case scenario.