The correct option is D Somatotropin
Somatotropin
do not have a specific target organ. The growth hormone is known as
somatotropin or somatotrophic hormone. ‘Soma’ means body and ‘trophe’ means
nourishment. It is secreted by anterior lobe of pituitary. It regulates the
growth of the body by promoting protein anabolism, intestinal absorption of
calcium, conservation of glucose etc. It helps in synthesis and depositing of
proteins, growth of long bones and other parts of the skeleton. Somatotropin does
not act on a specific organ, it acts on all cells of body.