Which of the Following Values Are Indicative of Acute Respiratory

Multiple Choice

Which of the following values are indicative of acute respiratory failure and the need for ventilatory support?
1) Maximum inspiratory pressure (MIP) = −25 cm H₂O
2) Dead space to tidal volume ratio (VD/Vᴛ) = 0.4
3) Vital capacity (VC) = 8 mL/kg IBW
4) pH = 7.20

A) 1 and 2 only
B) 2 and 3 only
C) 3 and 4 only
D) 1 and 4 only