Can we have a report rendered in a pdf and drill through or drill down from that report to another. Or, we have drill through/drill up/down available only in html
B,
Would you be referring to a table of contents on the report which would give the ability to drill to sections on report pages?
Nope. I have say report A which has a column for Country. I click on it and another report runs and shows me data for that country
You should be fine, I've a report which drills through to another report. The drill throughs work the same whether I run it as a PDF or in HTML