Which of the following is not an assumption of Maslow’s theory?

Maslow’s theory is based on the following assumptions:
(i) People’s behaviour is based on their needs. Satisfaction of such needs influences their behaviour.
(ii) People’s needs are in hierarchical order, starting from basic needs to other higher level needs.
(iii) A satisfied need can no longer motivate a person; only next higher level need can motivate him.
(iv) A person moves to the next higher level of the hierarchy only when the lower need is satisfied.