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: Pediatrics
Most common cause of death in case of acute poliomyelitis is – 
Select and explain. 
A. Intercostal muscles paralysis, B. Convulsion, C. Cardiac arrest, D. Respiratory failure
D: Respiratory failure
Answer: D: Respiratory failure 
Explanation: Death is usually due to complications arising from respiratory dysfunction.


Paralytic polio


In less than 1% of infections.
Paralysis is characterized as :


Descending 
Asymmetrical 
Proximal muscles > distal muscles
Non progressive
No sensory involvement 
No autonomic disturbance
Lower motor neuron type


Most common muscle affected -4 Quadriceps
Most common muscle undergoes complete paralysis -4 Tibialis anterior
Most common muscle affected in hand —> Opponens pollicis.
M.C. cause of death ---> Respiratory paralysis 
Following signs can be elicited :


Tripod sign   —>      Child is asked to sit up unassisted. He assumes tripod posture.
Kiss the knee Test           —>         The child cannot kiss his knees due to spine stiffness.
Head drop sign    —>        Hand is placed under the patients shoulder and the trunk is raised. The head lags behind simply.