<prompt> A patient presents to emergency with pinpoint pupil, salivation, lacrimation, tremors and red tears. Plasma cholinesterase level was 30 of normal. Most probable Diagnosis is:Organophosphate poisoningDatura poisoningOpioid poisoningPontine hemorrhage  <response>: Ans. A Organophosphate poisoningRef: Katzung 12e p110These are characteristic features of anti-cholinestearse organophosphate and carbamate poisoning.Features of Organophosphate poisoning: Muscarinic symptoms: Pin point pupil, salivation, lacrimation, urination, defecation, gastrointestinal distress, vomiting, bronchospasm, bradycardia Nicotinic symptoms: Fasciculations and fibrillations of muscle, tachycardia, tachypnea CNS symptoms: Temors, giddiness, ataxia, coma Red tears: Due to accumulation of porphyrin in the lacrimal glands 