Final answer:
The duty not included in a phlebotomist's responsibilities is starting intravenous (IV) lines, which is typically performed by nurses or other healthcare providers.
Step-by-step explanation:
The duty of a phlebotomist that is not included in their standard responsibilities is c. Starting intravenous (IV) lines. Phlebotomists are trained healthcare professionals whose primary duties include collecting blood specimens through venipunctures and capillary sticks, transporting specimens to the laboratory, and performing related tasks. Starting IV lines is typically the duty of a nurse or other qualified healthcare provider, not a phlebotomist. Phlebotomists do, however, have a key role in the collection and handling of blood for analysis, transfusions, and research.