Fixation is a concept related to: (A) Psychosocial stages of development, (B) Psychosexual stages of development, (C) Cognitive stages of development, (D) Hierarchy of needs
Answer is B. Fixation is concept introduced by Sigmund Freud, he explains this in his each stage of Psychosexual stages of development. Ref: Synopsis of Psychiatry, 11e, pg 157.