<prompt> Most common cause of death in amyotropic lateral sclerosis isCardiac failureRespiratory failureRenal failureLiver failure  <response>: Answer-B. Respiratory failureAmyotrophic lateral sclerosis ALS is the most cornmon form of progressive motor neuron disease. It is a prime example of a neurodegenerative disease and is arguably the most devastating ofthe neurodegenerative disorders.Respiratory failure is the leading cause of death in amyotrophic lateral sclerosis, and terminal dysnoea is a major fear in patients with amyotrophic lateral sclerosis. 