Can we file the income u/s 44ad aswel as business with books

hi friends,

My client is having two business,

1)  wholesale business  TO Rs 30 lakhs

2) Contract Works

He has maintained detailed books of accounts for only his wholesale business.

Can we file his return showing one business as special business u/s 44AD and another business with books of accounts?

And his net aggregate income from the both business doesnt cross the taxable limit..

Please guide me..