I see how to show particular ENTRIES  on the page using MTEntry tag though, I can't find how to show particular both CATEGORIES AND ENTRIES on the page.
For Example, if I have categories A, B, C, D and want to show category names and recent entries of A and C, how can I?

I'm not quite sure what you are asking. So please post back if you need more information, or if I'm heading off on the wrong track! You know how to use MTEntries category="A OR C" to show the entries you want?

Recent Entries (ie links to the last 5 entries in that category)for each category you could do like this:
- and the same thing for category C, changing the A to C, of course!

If you want to exclude specific categories from an Archive listing using MTArchiveList, I think you'll need the   Filter Categories Plug-In.

Unless anyone else has an idea, the other option would be, of course, to simply code in the actual links to your category archives...

Does that help?

I downloaded the plugin and found that it was just what i wanted!!
Thank you!!