True about ACE inhibitors are all except:: (A) Contraindicated in asthma, (B) Lacks postural hypotension, (C) Decreases potassium concentration, (D) Does not affect quality of life
Answer is C. The  adverse effect profile of all ACE inhibitors is similar. One adverse effect is:
Hyperkalaemia: This is likely in patients with impaired renal function and in those taking K+ sparing diuretics, NSAIDs or blockers.
In others, significant rise in plasma K+ is rare. It does not cause decrease in K+ concentration.
Reference: Essentials of Medical Pharmacology Eighth Edition KD TRIPATHI page no 531