Which of the following body secretions is maximum:

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.