Step 1: What is asked.
We need the person who received the Manohar Parrikar Yuva Scientist Award 2025.
Step 2: About the award.
This award encourages young scientific talent in India. It is named after Manohar Parrikar, a former Defence Minister and Chief Minister of Goa.
Step 3: The basis.
It is given to young researchers who have made real contributions in science and technology.
Step 4: The winner.
For 2025 the award went to Dr. Sai Gautham Gopalakrishnan.
Step 5: Remove others.
Dr. Ritu Karidhal, Dr. Mylswamy Annadurai, and Dr. Tessy Thomas are well known scientists, but not the winner here.
Step 6: Conclusion.
So the recipient is Dr. Sai Gautham Gopalakrishnan.
Answer: Dr. Sai Gautham Gopalakrishnan