Bone is the hardest in the body.
A) True
B) False

Hint: The highly mineralized tooth enamel present in our body is known to be the hardest substance in our body. Bones, on the other hand, are rigid parts of the human body which helps in locomotion of the body and provide structure.

Complete answer:
Bone is a very rigid part of the body. The Skeleton of the human body is made up of bone. Bones are the living tissues of our body, therefore they have their cell and blood vessels. Bone cells are known as osteocytes.
Bones protect the internal structure of the human body. They are rigid enough to protect the human body at the time of sudden pressure on the body. Tooth enamel is the hardest outer surface covering the teeth and protecting them from decay.
Humans tend to eat highly sweet and acidic food. Food is ingested by mouth and teeth are present in the buccal cavity. Therefore, teeth are directly exposed to the cavity prone substances. If tooth enamel is not hard then the tooth cavity will take place and all the teeth will be decayed.
Even after the presence of enamel, cavity, and tooth decay which is the destruction of tooth enamel is very common. Bacteria in our mouth makes the plaque, which uses the sugar and the starch and finally eats minerals of the enamel.
Therefore, we conclude that bone is not the hardest structure present in our body as given in the question.

Hence, this is a false statement. A true statement would be; bones are not the hardest part of the body or tooth enamel is the hardest part of the body.

Note: Tooth enamel’s chief ingredient is calcium phosphate. Products with high concentrations of calcium phosphate or with fluoride, a common additive, are best at helping teeth to remineralize naturally before damage exceeds the point of no return.