Mark the incorrect statement

Options

A. Smoking also paves the way to hard drugs
B. Tobacco has been used by human beings for more than 40 years
C. Smoking increases carbon monoxide (CO) content in blood and reduces the concentration of haembound oxygen
D. Nicotine stimulates adrenal gland to release adrenaline and nor-adrenaline into blood circulation, both of which raise blood pressure and increase heart rate

Answer

To determine the incorrect statement from the options provided, we will analyze each statement based on the information given in the video transcript.

1. **Statement 1**: "Smoking also paves the way to hard drugs."
- This statement is correct. Nicotine, found in tobacco, is addictive and can lead individuals to experiment with other drugs.

2. **Statement 2**: "Tobacco has been used by human beings for more than 40 years."
- This statement is incorrect. The transcript mentions that tobacco has been used for more than 400 years, not 40 years.

3. **Statement 3**: "Smoking increases carbon monoxide content in the blood."
- This statement is correct. The transcript explains that smoking introduces carbon monoxide (CO) into the bloodstream, which reduces the amount of oxygen that can bind to hemoglobin.

4. **Statement 4**: "Nicotine stimulates adrenaline to release adrenaline."
- This statement is correct. The transcript states that nicotine stimulates the adrenal gland to release adrenaline, which increases blood circulation, blood pressure, and heart rate.

Based on the analysis, the incorrect statement is:

**Answer**: "Tobacco has been used by human beings for more than 40 years."