Match the following methods of competency mapping with their explanations

List-I	List-II
a. Critical Incident Technique	1. It is an effective technique of gathering relevant info along with impressions about potential workers
b. Interview	2. It also conducts occupational analysis inventory which gives the work elements required for all professions
c. Questionnaires	3. Comprises of achievement test and aptitude tests
d. Psychometric tests	4. to recognise job specific behaviours which affect the failure or success of an individual