Match the following concepts with their respective psychologists:

Concept:

a) Collective unconscious

b) Basic anxiety

c) Inferiority complex

d) Ego identity

Psychologist:

i) Carl Jung

ii) Karen Horney

iii) Alfred Adler

iv) Erik Erikson

a-i, b-ii, c-iii, d-iv

Carl Jung discussed the collective unconscious (a), Karen Horney introduced the concept of basic anxiety (b), Alfred Adler talked about the inferiority complex (c), and Erik Erikson emphasized ego identity (d).