Will challenge evaluation work in the JNTUH? If it is the only hope to get promoted, lacking one credit.

I think applying for the usual revaluation in JNTUH is useless because mostly the difference in marks is 0. However, the challenge evaluation is worth the try. 

I know many friends whose marks increased drastically after applying for challenge evaluation despite being the same after the normal revaluation. Unfortunately, this is how the scenario is here and you have no choice but to apply for it. 

However, this process is very costly, around 10000 out of which 9000 can be redeemed if there is an increase in marks. So it’s advisable to go for a challenge evaluation especially if it's a question of promotion or an active backlog right before your placements.