Benzylisoquinoline muscle relaxant is ?

Ans. is 'c' i.e., Doxacurium Competitive (nondepolarizing) blockers are of two types - Benzylisoquinolone derivatives This includes - d-TC, doxacurium, atracurium, cisatracurium, mivacurium, metocurine. These drugs have tendency to release histamine and to block autonomic ganglion. Amminio steroid derivatives This include pancuronium, rocuronium, vecuronium, pipecuronium, rapacuronium. These drugs do not block autonomic ganglia and have minimal histamine releasing propey.