Hello dear..For Psychologist MBBS degree is not necessary.
MBBS prepare you for Psychiatrist not Psychologist.
you can pursue B.A or B.Sc and later your masters in Organizational Behavior or Industrial and Organizational Psychology.
To pursue your profession as Psychologist you have to do bachelor's and master's degree in psychology and other certified degree and diploma courses. Psychologist are also expected to do internships in related field. Psychologist ae trained to administer psychological tests.
Hope you got your answer.
Good luck
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