Case study on acute renal failure John is a 40-year-old male farmer. He is a smoker and an alcoholic, he was brought to the ED due to severe shortness of breath, confusion, nausea, weakness, and chest"

What is the most likely diagnosis for John?

a. Pneumonia
b. Acute respiratory distress syndrome (ARDS)
c. Acute renal failure
d. Chronic obstructive pulmonary disease (COPD)