Nepal

Please refer to the link provided below for details regarding admissions for NEET exam to qualify for scholarships/admission in MBBS.
https://www.shiksha.com/medicine-health-sciences/medicine/exams/neet-ug

Yes, you can take admission in the M.Ed course in India. You can directly contact the college/university that you are interested in via email/website. They will guide you through the application. You need to understand the eligibility criteria before applying to any particular college.

Yes, you can take admission in the M.Ed course in India. You can directly contact the college/university that you are interested in via email/website. They will guide you through the application.

Eligibility for Career in Optometry, Required Qualification for Optician, The students who has clear 10+2 or equivalent examination, with a minimum of 50% marks in physics, chemistry and biology are eligible for Optometry. In order to practice as an Optometrist, the candidate has to take Bachelor's

Hi Abhishek,
You have to check the official website of SAT for the registered test centers, please select the country and use the filters:
https://collegereadiness.collegeboard.org/sat/register/find-test-centers

How much did you score in 12th doesn't matter here. You need to clear the entrance exam conducted by NIFT in January. You should apply for the same.