Hormones are non-nutrient chemicals,which act as ....... messengers and are produced in trace amounts.

Which of the following statements are applicable to hormones?
$I -$ Neural messengers
$II -$ Intercellular messengers
$III -$ Produced in trace amounts
$IV -$ Nutrient chemicals
$V -$ Released into the blood after production.

Which of the following statements is false $:-$

What is the optimal temperature of the human body (in $^{\circ} C$)?

Which of the following is not a protein hormone?

Who proposed the term '$pheromone$'?