Question

Which is the most expensive method in terms of time, money and efforts involved? *
Indirect oral investigation
Direct personal investigation
Information through questionnaire
None of the above

Answer 1

It's actually primary data

There is no option so None of the above

Thank you.Hope it will help

Answer 2

Answer:

The data collected by an investigator himself to carry out a specific research is known as primary data. Since primary data is collected by the investigator for the first time from the original source of information, it involves huge cost in terms of money, time and effort.