In some cases, a hormone is unable to have its effect unless the target cell has a simultaneous exposure to a second hormone. Which is the term for this type of effect?

A, synergistic

B, antagonistic

C, symbiotic

D, permissive

The correct answer is option D. Permissive.

Explanation:

The permissive effect or interaction of a hormone is in which hormone can not show or exert its complete effect without the presence of another hormone on a specific target site or cell.

The interaction of a hormone can occur in two more ways - synergies and antagonism where synergy occurs when two hormones perform the same action on a target cell and impact are amplified, and antagonist has the opposite role in the presence of another hormone.

Thus, the correct answer is - d. Permissive.