What are the complementary tests in the study of fever syndrome?

Hemograma is a test that includes the differential count of leukocytes, but it is not sensitive or specific to differentiate bacterial from non-bacterial diseases.
A low leukocyte count may suggest viral pathology or depletion of PMN reserves in the bone marrow, suggesting a bacterial infection.
The presence of bacteria is the most sensitive indicator of urinary tract infection (UTI).
Hemocultures should be obtained in patients with suspicion or predisposition to bacteremia, carriers of prostheses, data of severity or suspicion of serious infections such as endocarditis, osteomyelitis, meningitis, etc.
a) I and II are correct.
b) II, III, and IV are correct.
c) I, III, and IV are correct.
d) All statements are correct.