Is there any way to know with which version of cumulative update, MCT will make ISO?

Thanks. I did search in net. I did as you suggested. Went fine.
How to do clean install with out USB?

I have win10 home 1809 17763.529. I downloaded 1903 iso and tried to update as I already got the info in my Windows update as shown in pic attached. But I got msg while updating as shown in pic right...

Today in India, I got msg in WU, download and install for 1903.