Final answer:
Informed consent prior to pharmacist engaging in prescribing is always necessary because it ensures that participants are fully aware of the risks and benefits of their participation in a study, as well as their right to withdraw at any time.
Step-by-step explanation:
Informed consent prior to pharmacist engaging in prescribing (a) Is always necessary because it ensures that participants are fully aware of the risks and benefits of their participation in a study, as well as their right to withdraw at any time.
An informed consent form provides a written description of what participants can expect during the experiment, including potential risks and implications of the research.
It also guarantees that any data collected will remain completely confidential.