Hello,

TGT stands for Trained Graduate Program , this title is given to teachers who have completed their graduation and are training for teachers. These candidates must complete there B.Ed/M.Ed/D.Ed which is mandatory.

On the other hand, PGT is the acronym of Post Graduate Teacher which is a criterion to become a teacher. Candidates must qualify the postgraduate exam along with completing the B.Ed/M.Ed. While CTET stands for (Central Teacher Eligibility Test) , which is a competitive exam conducted by CBSE (Central Board of Secondary Education), after qualifying the CTET exam, candidates will be able to join Kendriya Vidyalaya or Navodaya Vidyalaya.

J RF stands for Junior Research Fellowship and is conducted by UGC and CSIR, after qualifying the JRF exam candidates will be recruited as Assistant Lecturer.

I hope you  got your answer.