Final answer:
Family medical history is the least pertinent question in an acute situation because the focus is on immediate treatment and current condition.
Step-by-step explanation:
Out of the four options provided, the question that would be of the LEAST pertinence in an acute situation is 'What is your family medical history?'. While family medical history is important for assessing genetic predispositions and potential risks in a general sense, in an acute situation, the focus is more on the immediate treatment and current condition of the patient.