Knowing that both CROs and pharmaceutical companies conduct research and trials, what do you think would be an advantage working with a CRO rather than seeking employment with a large pharmaceutical company?

There is no right or wrong answer to this question. The interviewer merely wants to know your reason for working for a CRO instead of a pharmaceutical company. Focus on describing why you think working for a CRO is advantageous.

"I feel because CROs work with several pharmaceutical clients, there is more job stability. If one project is dropped unexpectedly, a CRO can place an employee on a new project with a different sponsor."