To answer this question, you need to understand the different types of connective tissues. Let's go through each option to understand why it is correct or incorrect:
Option A) Collagen - Collagen is a protein that is a major component of connective tissue. It provides strength and support to various tissues and organs in the body. Therefore, this option is incorrect.
Option B) Cartilage - Cartilage is a type of connective tissue that is flexible and provides support to various structures in the body, such as joints and the nose. Therefore, this option is incorrect.
Option C) Bone - Bone is also a type of connective tissue. It provides support, protection, and helps with movement. It is composed of cells, collagen fibers, and minerals. Therefore, this option is incorrect.
Option D) They are all connective tissues - This option is NOT connective tissue. It is a statement that suggests that all the previous options are connective tissues. However, this is incorrect because collagen, cartilage, and bone are all types of connective tissues. Therefore, this option is correct.
The correct answer is D. This option is correct because it states that they are all connective tissues, which is not true.