Human nutrition includes nutrient requirement made of intake of food and its utilisation in the body occurring in various steps which are
1. absorption
2. egestion
3. assimilation
4. ingestion
5. digestion
Arrange these steps in sequence as they occur inside the body.

Options

A. `5, 4, 3`
B. 4, 1, 2, 3, 5
C. 1, 2, 3, 4, 5
D. 4, 5, 1, 3, 2

Explanation

To arrange the steps of human nutrition in the correct sequence, we need to understand the meaning of each step involved in the process. Here’s the breakdown:

1. **Ingestion**: This is the first step where food is taken into the body through the mouth. The food is broken down into smaller pieces by the teeth and mixed with saliva.

2. **Digestion**: After ingestion, the food undergoes digestion. This is the process where enzymes break down the food into simpler substances that can be absorbed by the body.

3. **Absorption**: Once the food is digested, the next step is absorption. This is when the nutrients from the digested food are absorbed into the bloodstream and transported to cells throughout the body.

4. **Assimilation**: Following absorption, assimilation occurs. This is the process where the absorbed nutrients are utilized by the cells to produce energy and build tissues.

5. **Egestion**: Finally, egestion is the last step where any undigested food and waste products are expelled from the body.

Now, putting these steps in the correct order, we have:

1. Ingestion
2. Digestion
3. Absorption
4. Assimilation
5. Egestion

Thus, the correct sequence is: **Ingestion (4), Digestion (5), Absorption (1), Assimilation (3), Egestion (2)**.

### Final Answer:
The correct sequence of steps in human nutrition is: **4, 5, 1, 3, 2**.