Anesthesiology

General Anesthesia. General anesthesia is an anesthetic used to induce unconsciousness during surgery. The medicine is either inhaled through a breathing mask or tube, or given through an intravenous (IV) line. A breathing tube may be inserted into the windpipe to maintain proper breathing during surgery.
You can learn it more from below mentioned site:
https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.hopkinsmedicine.org/health/treatment-tests-and-therapies/types-of-anesthesia-and-your-anesthesiologist?amp=true&ved=2ahUKEwiao_KjyZriAhXYVisKHZZnCNgQFjABegQIEBAE&usg=AOvVaw3U1gQ_PKH0AsRi3DFI5VKf&cf=1
Hope this helps you.

Please specify the Ccllege.

Eligibility for B.Sc in Operation Theatre and Anaesthesia :
Minimum 50% required in 12th with Mandatory Subjects : Chemistry, Biology, Mathematics
For more details : https://www.shiksha.com/medicine-health-sciences/paramedical/course/b-sc-in-operation-theatre-and-anaesthesia-technology-apollo-institute-of-hospital-management-and-allied-sciences-ayanambakkam-chennai-175710

Yes.
NEET is required for doing B.Sc in Anasthesia technology and Audiology and Speech Therapy!

The eligibility for this course is class 12th or equivalent examination in the Science stream with a minimum of 45% marks in Physics, Chemistry, and Biology. If you fulfil the eligibility, you can go ahead and apply.

Mentioned below are the top colleges for B.Sc. Anesthesia technology in India:
Jawaharlal Institute of Post Graduate Medical Education and Research - [JIPMER], Pondicherry
KLE University, Belgaum
Jain University - [JU], Bangalore
Sumandeep Vidyapeeth, Vadodara.