The full form of narco in this phrase is "narcotic." A narco-analysis test is one that uses a narcotic psychoactive serum to learn the truth about something from someone who is not willing to provide it. It is, essentially, a truth serum.
NARCO is derived from Greek word which means "Anesthesia" or "torpor".
The full form of PT is Proficiency Test.
The full form of the PSA blood test is Prostate-Specific Antigen.
Design Automation and Test in Europe
The full form of CAT is the Continuos Assessment Test.
Xavier's Aptitude Test.
Scholastic aptitude test
management aptitude test
Common Admission Test
graduation entrance test
Power-on self-test
Cost aggregative test