for review class videos ...you have to click on practice then you have to click on the particular test say test 2 ...there will be last attempt report click on that...then it will display 3 section - score anatomy, my answers and explanation videos...you have to click on explanation videos and you can see the review session for that particular test ...hope this would help you :)

yeah

160+

21st

I'm not really sure but you should ask your counsellor.

yess..

intoduced this year onwards..

i don't think there are special notes on types of architecture. You just have to go through the whole topic in architecture awareness. You would get some idea.(famous architects and their works)

Never

soon they will upload mock test for 2020 syllabus

keep checking the nata's official site https://www.nata.in/NATA_2020_Brochure-v1.3FINAL.pdf?v=c2988c7f8233d6565565