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Select correct option among the given st...

Select correct option among the given statements regarding true and false. (a) Nicotine reduces the concentration of haembound oxygen, br (b) Nicotine raises blood pressure and increases heart rate, br ( c ) Smoking is associated with increased incidence of cancers, br (d) Smoking causes oxygen deficiency only in the lungs.

A

(a)T, (b)T, ( c)T, (d)T

B

(a) T, (b) F, (c ) T, (d) F

C

(a) F, (b) F, (c ) T, (d) T

D

(a) T, (b) T, (c ) T, (d) F

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to evaluate each statement regarding nicotine and smoking to determine which are true and which is false. ### Step-by-step Solution: 1. **Evaluate Statement (a)**: "Nicotine reduces the concentration of haembound oxygen." - **Explanation**: Nicotine is known to bind with hemoglobin, which reduces the ability of hemoglobin to carry oxygen. Therefore, this statement is **true**. 2. **Evaluate Statement (b)**: "Nicotine raises blood pressure and increases heart rate." - **Explanation**: Nicotine stimulates the release of adrenaline, which increases heart rate and blood pressure. Thus, this statement is also **true**. 3. **Evaluate Statement (c)**: "Smoking is associated with increased incidence of cancers." - **Explanation**: Smoking is well-documented to increase the risk of various cancers due to the harmful substances (like tar) it introduces into the body. Therefore, this statement is **true**. 4. **Evaluate Statement (d)**: "Smoking causes oxygen deficiency only in the lungs." - **Explanation**: While smoking does affect the lungs, the reduction in oxygen-carrying capacity due to nicotine and other chemicals affects the entire body, not just the lungs. Hence, this statement is **false**. ### Conclusion: - Statements (a), (b), and (c) are true. - Statement (d) is false. The correct option is that statements (a), (b), and (c) are true, while statement (d) is false.
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