Question

As compare to whole body, the head of a new born human baby is
A. One-third
B. One- half
C. One - fifth
D. One- fourth

Answer 1

Hint: The structure and size of the human body drastically change with the growth of the body part. Normal head circumference for a full- infant is around 33 to 36 cm at the time of the birth. It's size does not change drastically in the whole life of a person.

Complete answer: Bringing up a new baby at home is an exciting experience for a family. When a child is taken out of the womb, its size and shape is distorted due to excess pressure being put on it when taken out of the womb of the mother. Most babies' head shape issues are temporary which go away themselves. Some babies need a bit of help to gently mold their head shape.
When a baby is born, their bones are thin as well as flexible. In rare cases, a serious birth problem can lead to some noticeable changes in the shape of the head. In newborns, the skull is made up of flat bones that are loosely joined together. The soft spots on top and near the back of a baby's head are called fontanelles. These spots allow a baby's relatively large head to move through the narrow birth canal. They also accomodate the baby that are growing rapidly during infancy.
Suture allows the bones to move during the birth process. They are called expansion joints and allow the bones to enlarge as the brain grows and skull expands which results in a symmetrical shaped head.
A newborn's head is very large in proportion to the body, and the cranium is enormous to the face of the child. As the child crows up it undergoes changes due to which the adult human skull is about one seventh of the total body length which means it eventually grows up with age.

So, the correct option is D, one- fourth.

Note: Positional molding of the shape of the brain of the new born baby is considered as a cosmetic issue. Flat spots caused due to pressure on the back of the head do not cause the brain to damage and even do not interfere in the development of the child. These issues can be solved by taking preventive measures.