Explanation:
The correct answer is B: Adrenalin.

Explanation:
Adrenalin (also known as epinephrine) is produced by the adrenal glands, which are located above the kidneys. It is a key hormone involved in the body's "fight or flight" response, which occurs during situations of fright, danger, or agitation. When released into the bloodstream, adrenalin causes various physiological changes, such as increased heart rate, increased blood flow to muscles, dilation of the airways, and the release of glucose for energy, preparing the body to respond to stress.

Here's why the other options are incorrect:
- A. Insulin: Insulin is produced by the pancreas and helps regulate blood glucose levels, but it is not associated with stress responses.
- C. Thyroxine: Thyroxine is produced by the thyroid gland and plays a role in regulating metabolism, but it is not directly related to the body's response to stress or agitation.
- D. Pituitrin: Pituitrin is an older name for a hormone produced by the pituitary gland, which regulates water balance and blood pressure, but it is not involved in stress responses.
- E. Progesterone: Progesterone is a hormone involved in the menstrual cycle and pregnancy, but it is not produced during fright or agitation.

Therefore, adrenalin is the hormone produced during times of fear or agitation.