which of the following is responsible for amplification of signal in hormone action

1. P₁P₂
2. INSULIN
3. IP₃
4. SODIUM

Hello Student
Correct answer is 3. Ionositol triphosphate (IP₃)
Ionositol triphosphate (IP₃) is formed by the degradation of phosphatidy ionositol 4,5-biphosphate (P₁P₂) by the enzyme phosphodiesterase. IP₃ acts as interacellular secondary messanger and helps to amplify the hormonal signal by stimulating the release of Ca⁺⁺from ER target cells.