Tax audit

Suppose an assessee (sole proprietor) has three difeerent business one of jewellery (turnover Rs 45 lacs),construction (turnover Rs 50 lacs) and sports wear (turnover Rs. 15 lacs) now the indivdual business doesnot exceed the limit of 100 lacs for tax audit but we combined the turnover of all three business the limit is reached, so does the assessee need tax audit, if yes. will it be consolidated tax audit?? further if suppose the turnover of jewellery business is 110 lacs and other two business has turnover of Rs.20 lacs only in this case will tax audit will be for all the three business or only for jwellery business.