Tobacco consumption is known to stimulate secretion of adrenaline and nor-adrenaline. The component causing this could be

Options

A. nicotine
B. tannic acid
C. curaimin
D. catechine

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the component in tobacco that stimulates the secretion of adrenaline and noradrenaline. These two are hormones produced by the adrenal glands that play a crucial role in the body's response to stress.

2. **Identifying the Hormones**: Adrenaline and noradrenaline are known as the "fight or flight" hormones. They prepare the body to respond to stressful situations by increasing heart rate, blood pressure, and blood sugar levels, providing the body with a sudden burst of energy.

3. **Components of Tobacco**: Tobacco contains various chemical compounds. The most notable and relevant component in this context is nicotine.

4. **Role of Nicotine**: Nicotine is a stimulant that affects the central nervous system. When consumed, it stimulates the adrenal glands to release adrenaline and noradrenaline, which leads to the physiological effects associated with stress responses.

5. **Other Components**: While there are other components in tobacco, such as tannic acid, curcumin, and catechin, they do not have the same stimulating effect on the adrenal glands as nicotine does. Tannic acid is a polyphenol, curcumin is a pain reliever, and catechin is an antioxidant, none of which directly stimulate adrenaline and noradrenaline secretion.

6. **Conclusion**: Based on the analysis, the component in tobacco that causes the stimulation of adrenaline and noradrenaline secretion is nicotine. Therefore, the correct answer is nicotine.

**Final Answer**: The component causing the stimulation of adrenaline and noradrenaline secretion in tobacco is nicotine.

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