फोटो-एलिसिटेशन (चित्र-उत्प्रेरण) तकनीक का उपयोग मुख्य रूप से किसमें किया जाता है?

Which one of the following is NOT classified as a standard type of research interview based on structure?

Arrange the following steps of the research process in the correct chronological sequence: (I) Formulation of research problem (II) Collection of data (III) Developing a data collection instrument (IV) Processing and analysing data