Changing questions graded in test

I am creating a course that has 2 tests in it. In the beginning a question asks weather you are a pharmacist or not. 1st test everyone takes, 12 questions long. 2nd test only the people who clicked "yes" on the pharmacy question take, 11 questions long.My problem is that when the test is submitted everyone that clicked "no" on the Pharmacy question gets an incomplete test score. I was wondering how I could make it so the people who aren’t Pharmacists are graded based on the first 12 question test, and the Pharmacists get graded on a 23 question test (tests 1&2).