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: Physiology
Which of the following body secretions is maximum: 
Select and explain. 
A. Salivary, B. Gastric, C. Sweat, D. Lacrimal
B: Gastric
Answer: B: Gastric 
Explanation: Option 1 - Overall, the three pairs of salivary glands that drain into the mouth, supply 1000 to 1500 mL of saliva per day.
Option 2 - Gastric secretion adds about 2.5 L per day to the intestinal contents.
Option 3 - The insensible water loss amounts to 50ml/h in humans. During muscular exertion in a hot environment, sweat secretion reaches values as high as 1600ml/h.
Option 4 - Average tear production rate is 1.2 µL/min. Normal tear volume of approximately 6-8µL.