What are the different types of profiles used in clinical biochemistry?

I- A combination of several tests can be used when a single individual test is not sufficient to evaluate a disease.
II- The pattern of results from the combination of tests can offer a better view of the patient's condition than the result of any individual test.
III- Profiles or panels are groups of tests requested together, usually performed with the same sample.
IV- The types of profiles and specific tests included in them reflect local, regional, or national practice.
a) Only I and II are correct.
b) Only III and IV are correct.
c) All statements are correct.
d) None of the statements are correct.