Question: A 24-year-old woman is found lying on the street by some passers-by. When the emergency team arrived, they found it with an oxygen saturation of 88% breathing ambient air and a punctiform pupil examination. It is transferred to the nearest hospital emergency, where arterial blood gas analysis shows: pH 7.25, PaCO2 60 mmHg, PaO2 58 mmHg, bicarbonate of 26 mEq / L and excess of bases of -1. In blood sodium is 137 mEq / L and chloride 100 mEq / L. From a gasometric point of view, the patient has: 
 Options:  <1> Partial respiratory failure. <2> Metabolic acidosis. <3> Pure respiratory acidosis <4> Respiratory alkalosis due to lack of chlorine. <5> The gasometry can only be of venous blood.
3