Hi Shraddha,

Yes, if you do B.Sc. Biotechnology, you will be eligible for CDS.

The course - wise qualifications required to give UPSC CDS 2020 exam are as follows:-

• Indian Military Academy (IMA) - Degree of a recognized University or equivalent
• Indian Naval Academy (NA) - Degree in Engineering from a recognized University/Institution
• Air Force Academy (AFA) - Degree of a recognized University (with Physics and Mathematics at 10+2 level) or Bachelor of Engineering
• Officers' Training Academy (OTA - Men) - Degree of a recognized University or equivalent
• Officers Training Academy (OTA - Women, Non-Technical) - Degree of a recognized University or equivalent

Refer here for more info - https://competition.careers360.com/articles/cds-eligibility-criteria

Feel free to ask doubts in the Comment Section.

I hope this information helps you.

Good Luck!