To solve the problem, we need to identify the enzyme that is lacking in an infant suffering from indigestion.
1. Understanding the Role of Enzymes in Digestion:
Different enzymes play crucial roles in the digestive process:
- Amylase: This enzyme is involved in breaking down starches into sugars. It is mostly active in the mouth and small intestine.
- Rennin: This enzyme is responsible for curdling milk in the stomach of infants. It is crucial for digestion in babies, particularly during the first few months of life.
- Trypsin: This enzyme helps break down proteins in the small intestine but is not critical for infants with indigestion related to milk.
- Lipase: This enzyme helps in the breakdown of fats, primarily active in the stomach and small intestine.
2. Analyzing the Enzyme Lacking in an Infant:
In infants, the absence of rennin can lead to indigestion, especially related to milk, as it helps in curdling milk and aids in its proper digestion.
Final Answer:
The correct option is (B) Rennin.