This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Drowning, Subject name: Forensic Medicine
Which is not diagnostic of antemoem drowning? 
Select and explain. 
A. Water in the small intestine, B. Emphysema aquosum, C. Mud in the upper airways, D. Haemorrhage in the middle ear
C: Mud in the upper airways
Answer: C: Mud in the upper airways 
Explanation: SIGNS OF ANTEMOEM DROWNING External findings: Cadaveric spasm holding grass, gravel and sand in hand Fine, white lathery froth in mouth & nose. Internal findings Presence of froth mixed with sand paicles in the trachea & bronchi (paicularly in the lower airways) Mud in the upper airway alone may be seen in post-moem drowning as well. Presence of water in stomach & small intestine Presence of water and hemorrhage in middle ear Non specific signs: Cutis anserina Washerwoman's hands