Query on tax audit applicability

Hi,

I wanted to know whether in the case stated below tax audit u/s 44 AB is mandatory or not ??

Mr. X has a trading business with turnover of 50 lakhs. He maintains proper books of a/c. Mr. X wants to file his return of income in ITR-4 form (not in ITR-4S i.e. he is not opting for sec 44AD). He wants to show his Net Profit at 3 Lakhs (which is less than 8% of the turnover). Is Mr. X required to get his boks of account audited ??