<prompt> Delayed onset polyneuropathy after organophosphorous poisoning is seen after a period of:1-2 weeks2-4 weeks4-6 weeks6-8 weeks  <response>: Organophosphate-induced delayed polyneuropathy OPIDP occurs 2-3 weeks after exposure to large doses of ceain organophosphates OPs and is due to inhibition of neuropathy target esterase. Distal muscle weakness with relative sparing of the neck muscles, cranial nerves, and proximal muscle groups characterizes OPIDP. Recovery can take up to 12 months. 