Consider the following factors about socialization, as conceived by Sigmund Freud:

1.   ‘Super-ego’ develops in an individual when the latter assimilates his/her parent’s ideas of right and wrong.

2.   The rational part of the individual’s ‘id’ takes the form of ego.

3.   The individual’s organism contacts the external world.

4.   Innate tendencies, stored in the ‘id’ seek satisfaction in the external world.

Which one of the following is the correct sequence of the factors given above.