The set of hormones which lead to the formation of secondary messengers like cyclic AMP during their mode of action is:

Options

A. LH, FSH, ACTH
B. Estrogen , oxytocin , FSH
C. Cortisol , estrogen , progesterone
D. Thyroxine , estradiol, LH

Answer

To solve the question regarding the set of hormones that lead to the formation of secondary messengers like cyclic AMP during their mode of action, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Role of Hormones**:
Hormones can be classified into two main categories based on their structure: peptide hormones and steroid hormones. Peptide hormones typically interact with membrane-bound receptors, while steroid hormones interact with intracellular receptors.

**Hint**: Remember that peptide hormones often lead to the production of secondary messengers.

2. **Identify the Hormones Listed**:
The question provides a list of hormones: FSH, ACTH, estrogen, oxytocin, cortisol, progesterone, thyroxin, estradiol, and LH. We need to determine which of these are peptide hormones that can generate cyclic AMP.

**Hint**: Focus on hormones that are known to be peptide hormones.

3. **Classify the Hormones**:
- **Peptide Hormones**: FSH (Follicle Stimulating Hormone), ACTH (Adrenocorticotropic Hormone), LH (Luteinizing Hormone), and oxytocin are peptide hormones.
- **Steroid Hormones**: Cortisol, estrogen, progesterone, and estradiol are steroid hormones.
- **Thyroid Hormones**: Thyroxin is also a different category.

**Hint**: Recall that peptide hormones are typically produced by the pituitary gland and are involved in signaling pathways that produce secondary messengers.

4. **Determine the Production of Cyclic AMP**:
Among the peptide hormones, FSH, ACTH, and LH are known to stimulate the production of cyclic AMP as a secondary messenger in their signaling pathways.

**Hint**: Look for the hormones that are directly associated with cyclic AMP production.

5. **Select the Correct Answer**:
Based on the classification and understanding of the hormones, the set of hormones that lead to the formation of secondary messengers like cyclic AMP is FSH, ACTH, and LH. Therefore, the correct answer is the first option listed in the question.

**Hint**: Verify the answer by recalling the mechanisms of action for each hormone.

### Final Answer:
The set of hormones which lead to the formation of secondary messengers like cyclic AMP during their mode of action is FSH, ACTH, and LH.