Hi Aditya,

25.2 percentile is not a good score in CAT 2018. I Would suggest you to prepare for CAT 19 with better study preparation.

For getting into DTU you need to score atleast 85 percentile to get a call for gd/pi.

There are other good college also for MBA you can try over Amity Business School,Noida, NDIM and FIIB. These colleges will have there own entrance exam. 

So not to worry if you want to do MBA this year only then you can apply for these colleges otherwise opt for another year for preparation.

Wish you good luck.