Which pair of hormones has opposite roles in human body?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Glucagon and Insulin.
Insulin lowers the blood glucose level and glucagon raises it, so their roles are opposite.
Why the other options are incorrect
Option (1) Epinephrine and Thyroxine — Incorrect. Both increase the metabolic rate; epinephrine (adrenaline) prepares the body for “fight or flight” and thyroxine controls the basal metabolic rate. They do not oppose each other.
Option (2) Insulin and Testosterone — Incorrect. They act on unrelated processes: insulin on blood glucose, testosterone on male sexual characteristics.
Option (4) Norepinephrine and Thyroxine — Incorrect. Norepinephrine, like epinephrine, raises heart rate and metabolism, and thyroxine also raises metabolism, so their effects add up.
NCERT (2026-27 edition):
Hormones – …
