Which one of the following is the correct order of peristalsis in human digestive system ? 

A) Grinding → Propulsion → Retropulsion 

B) Retropulsion → Grinding → Propulsion 

C) Propulsion → Retropulsion → Grinding 

D) Propulsion → Grinding → Retropulsion

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1 Answers

D) Propulsion → Grinding → Retropulsion

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