Psychology

You can refer to the following link -
https://www.shiksha.com/college/st-xavier-s-college-ahmedabad-navrangpura-48348/courses

You can refer to the following link -
https://www.shiksha.com/college/unitedworld-school-of-liberal-arts-and-mass-communication-karnavati-university-Ahmedabad-52786/course-b-a-hons-in-psychology-357865.

Candidates who have completed a bachelor's degree in psychology as the main subject are eligible to get admission to this course.
refer link: https://www.shiksha.com/humanities-social-sciences/psychology-chp

Yes, you can do it without any problem.

Yes, you can apply for Masters without a Bachelors degree. DU colleges for Psychology -
Gargi College (W). Lady Shri Ram College for Women (W)
Indraprastha College for Women (W)
Jesus and Mary College (W)
Daulat Ram College (W)
Kamala Nehru College (W)
Vivekananda College (W)
Shyama Prasad Mukherji College for Women (W).

You can check out their official website for details regarding the fees structure. For further details, you can check out the following - https://www.shiksha.com/university/doon-university-dehradun-37081

There are various private colleges that give admission to Masters without a related undergraduate degree. You can check out Amity University, it gives you admission in any field without prior education or experience in the field.