If you want to take admission in DTU through PMSSS then you don't have to pay the remaining fees. I know it is higher than 1.25 lakhs but students who are currently studying under this scheme have already answered this question and this is a repeated question. A screenshot has also been attached with this answer in which AICTE has clearly mentioned that no institute can ask for extra fees from the students.
Conclusion: You can take admission in DTU don't worry about extra fees.
Please don't ask repeated questions on the website.
You can check the answer from here by the student of DTU.