GSTIN issues advisory on new functionality of Classification of Taxpayers

The advisory is as follows:

Taxpayers are required to select their business activity only once, as – Manufacturer, wholesaler/Distributor/ Retailer, service providers & others post-login based on the highest turnover amongst them. You can change the same later.

Source: GST Portal

So what we understand is, that there was confusion that while selecting core Activity, what will taxpayer select if he is involved in more than 2 types of business activity?

For Example, a Taxpayer is involved in Trading as well as Service. What should he select in such a case?

In that case, he shall select the Activity from which he is having the Highest turnover amongst Trading and Service.