Which of the following sentences are the incorrect ones with respect to the concept of educational administration?

(i) It is a service activity through which the objectives of the educational process may be effectively realized.

(ii) It is concerned with human relationships but not concerned with the management of things.

(iii) It is the process of 5 elements – planning, organizing, direction, coordination and control.

(iv) It is the process of not integrating the efforts of personnel but utilizing appropriate materials in such a way to promote effectively the development of human qualities.  

Select the correct answer from the options given below :