if i have a critical reasoning question where shall i post it..thanks

It depends on the source.

If it's from a ManhattanGMAT red strategy guide or the associated online question banks, post in the MGMAT Verbal Strategy Guide folder.

If it's from a ManhattanGMAT CAT exam, post in the MGMT CAT Verbal folder.

If it's from a GMATPrep test, post in the GMATPREP verbal folder.

Questions from other sources should be posted in the General Verbal folder - as long as the question is not from a banned source. If it's from OG, you can't post it here unfortunately (it's not legal to post OG questions on the web). There are also other banned sources - check the "sticky" at the top of the General Verbal folder for the other banned sources. That sticky will also tell you how to post the question (there are rules to follow). :)