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: Pharmacology
Which of the following is the most reliable clinical endpoint to indicate adequate atropinisation in organophosphate poisoning: 
Select and explain. 
A. Pupillary dilatation, B. Control of diarrhea, C. Heart rate more than or equal to 100 beats/min, D. Absence of pulmonary secretions
D: Absence of pulmonary secretions
Answer: D: Absence of pulmonary secretions 
Explanation: None