<prompt> Which of the following curve best demonstrates somatic growth- Here X-axis is age in years.  <response>: 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. 