This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anaesthesia
Agents safe in renal failure – a) Gallamineb) Pancuroniumc) Vecuroniumd) Mivacurium 
Select and explain. 
A. ab, B. bc, C. bd, D. cd
D: cd
Answer: D: cd 
Explanation: Muscle relaxants safe in renal failure

Muscle relaxants completely independent of renal function → Atracurium, cisatracurium, Sch, Mivacurium.
Muscle relaxants primarily excreted in bile → Vecuronium, rocuronium (very less amount is excreted by kidney).