Which of the following is related to osmoregulation?

Correct option is D

Correct Answer: (d) All of the above
Explanation:
→ All three hormones contribute to osmoregulation in fishes, either directly or indirectly.
→ Thyrotropin influences metabolic rates affecting ion balance.
→ Corticotropin regulates cortisol, a major seawater-adaptation hormone.
→ Calcitropin affects calcium–phosphate balance important for osmotic stability.
Information Booster:
→ Osmoregulation maintains homeostasis in varying salinities.
→ Freshwater fishes conserve ions; marine fishes conserve water.
→ Endocrine control ensures adaptation during migration (e.g., salmon).
Additional Information (Other Options):
Each listed hormone independently supports osmotic regulation pathways.