Explanation:

Here’s the thing, when we’re talking about enzymes in saliva, this is what you need to know:

- Option 1: Amylase

This is the key player in your saliva. Specifically, it’s called salivary amylase or ptyalin. It starts breaking down starches right in your mouth.

- Option 2: Rennin

This one isn’t found in saliva. Rennin works mainly in the stomach of young mammals, helping them digest milk by curdling it.

- Option 3: Trypsin

You’ll find trypsin in the small intestine, not your mouth. It’s great at breaking down proteins, but saliva is not its territory.

- Option 4: Pepsin

This is your stomach’s specialty. Like trypsin, pepsin digests proteins, but it needs the acidic environment of your stomach. Again, not in saliva.