**Enzymes in Pancreatic Juices and Their Role in Digestion**

The pancreas is an important organ located in the abdominal cavity that plays a crucial role in digestion. It produces and releases pancreatic juices, which contain various enzymes that aid in the breakdown and absorption of nutrients from the food we consume. These enzymes are responsible for the digestion of proteins, fats, and carbohydrates. Let's take a closer look at each of these categories.

**1. Proteins:**

Protein digestion begins in the stomach with the enzyme pepsin. However, the process is completed in the small intestine with the help of pancreatic enzymes such as trypsin, chymotrypsin, and carboxypeptidase. These enzymes break down proteins into smaller peptides and amino acids, which can be absorbed and utilized by the body for various functions such as growth, repair, and enzyme synthesis.

**2. Fats:**

Digestion of fats is a complex process that involves the emulsification and breakdown of large fat molecules into smaller molecules called fatty acids and glycerol. Pancreatic lipase is the primary enzyme responsible for fat digestion, and it acts on the emulsified fats in the small intestine. This enzyme breaks down triglycerides into fatty acids and monoglycerides, which can then be easily absorbed by the body.

**3. Carbohydrates:**

Carbohydrate digestion begins in the mouth with the enzyme salivary amylase, which breaks down complex carbohydrates into smaller sugars. However, the majority of carbohydrate digestion occurs in the small intestine with the help of pancreatic amylase. Pancreatic amylase further breaks down complex carbohydrates like starches into simpler sugars like glucose, fructose, and maltose. These simple sugars can then be absorbed by the body and used as a source of energy.

**Conclusion:**

In conclusion, the enzymes contained in pancreatic juices play a vital role in the digestion of proteins, fats, and carbohydrates. These enzymes help break down these macronutrients into smaller molecules that can be easily absorbed and utilized by the body. Therefore, option 'D' - proteins, fats, and carbohydrates - is the correct answer as it encompasses all the major nutrients that are digested with the help of pancreatic enzymes.