The amount of bile released in proportion to the amount of ___________.

1. ​fat in meal
2. protein in meal
3. carbohydrate in meal
4. all of the above

Obviously it isfat. Fats or Oils chemically called as Lipids
Let me tell you an real life practical.
When you take more Oily food,
you will get more yellow coloured bile deposited in your stomach.
It comes out when you clean your tongue in yellow colour.

The purpose of bile is not to digest the food,Only to assist in digestion process as a catalyst.