Which of the following curve best demonstrates somatic growth- Here X-axis is age in years.

Option (b) - Demonstrates somatic growth curve which follows a sigmoid shape Option (a) - Demonstrates Brain growth. The brain size/ head size in neonate is about 65-70% of the expected head size in adults. It reaches 90% of the adult head size by the age of 2 years. Option (c) - Demonstrates lymphoid growth. Lymphoid growth is most active between 4-8 years of age after which it slows down. Option (d) - Demonstrates gonadal growth which peaks during pubescence.