Handeling of Clinical Trial

How many phases of the clinical trials?

In Pre-Clinical Trials ,No human testing can be carried
out at this stage ?

Yes

No

Maybe

Phase III Clinical Trial , Used to gain product approval/labeling ?

Yes

No

Do you know the meanings of Crossover Study ,Cohort Study ,Case-Control Study?

Yes

No

P-Value considered statically significant when equal or less than?

0.9

0.5

0.05

From your point of view what is the most important point to know in the clinical trial?