Which of the following is made of calcium?

Correct option is A

The correct answer is (a) Teeth.
Teeth are primarily composed of calcium compounds, which provide them with strength and hardness. The main mineral component of teeth is calcium phosphate in the form of hydroxyapatite. This compound makes up the enamel, the outermost layer of the teeth, which is the hardest substance in the human body.
· Teeth are made up of multiple layers: enamel, dentin, and pulp. Enamel contains about 96% minerals, mostly calcium phosphate.
· Calcium plays a crucial role in maintaining the structural integrity of teeth and bones.
· A deficiency in calcium can lead to weakened teeth, increased risk of cavities, and other dental issues.
Additional Knowledge :
· Blood: Blood contains calcium ions, but it is not made of calcium. It primarily consists of red blood cells, white blood cells, and plasma.
· Plasma: Plasma is the liquid component of blood, mainly made up of water, proteins, and salts.
· Bile: Bile is a digestive fluid produced by the liver and stored in the gallbladder, composed mainly of bile salts, cholesterol, and bilirubin.