The place where cartilage is present in our body is:

Cartilage is a type of connective tissue found in various parts of our body. It is a flexible and tough tissue that provides support, structure, and cushioning to different areas. The correct answer to the question is option 'D' which states that cartilage is present in the outer parts of the ear, at the end of the nose, and in the discs between the vertebrae of the backbone. Let's explore each of these locations in detail:

1. Outer parts of the ear:
- The outer parts of the ear, also known as the pinna or auricle, are made up of cartilage.
- Cartilage in this region helps to maintain the shape and structure of the ear.
- It provides flexibility and allows the ear to move and bend without breaking easily.

2. At the end of the nose:
- The tip of the nose is composed of cartilage.
- This cartilage gives shape and support to the nose, allowing it to maintain its structure.
- It also provides flexibility and resilience, enabling the nose to withstand external forces without fracturing.

3. Discs between vertebrae of the backbone:
- The backbone, also known as the spinal column, is made up of a series of bones called vertebrae.
- Between each pair of adjacent vertebrae, there are intervertebral discs made of cartilage.
- These discs act as shock absorbers and help to cushion the spine during movement, reducing friction and preventing damage to the vertebrae.
- The cartilage in these discs allows for flexibility and smooth movement of the spine.

Summary:
Cartilage is present in various parts of our body, including the outer parts of the ear, the end of the nose, and the discs between the vertebrae of the backbone. It provides support, structure, and cushioning to these areas, allowing for flexibility and protection against injury.