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Consider the following statements I.0.2 ...

Consider the following statements
I.0.2 to 0.4 ppm `Cl_2` solution is used as disinfectant for drinking water
II.Many body secretions either kill the microbes or inhibit their growth
III.Body possesses an efficient natural defence mechanism which operates at all times against potential pathogenic microbes
Select the correct statement

A

I and II

B

II and III

C

I And III

D

all of these

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to analyze each of the provided statements regarding their correctness. ### Step-by-Step Solution: 1. **Evaluate Statement I:** - Statement I claims that a solution of 0.2 to 0.4 ppm of `Cl_2` is used as a disinfectant for drinking water. - **Analysis:** Chlorine is commonly used to disinfect drinking water, and the concentration mentioned (0.2 to 0.4 ppm) is indeed within the range used for effective disinfection. - **Conclusion:** Statement I is **correct**. 2. **Evaluate Statement II:** - Statement II states that many body secretions either kill microbes or inhibit their growth. - **Analysis:** Body secretions such as saliva, tears, and sweat contain antimicrobial substances like lysozyme, which can kill bacteria or inhibit their growth. - **Conclusion:** Statement II is **correct**. 3. **Evaluate Statement III:** - Statement III asserts that the body possesses an efficient natural defense mechanism that operates at all times against potential pathogenic microbes. - **Analysis:** The human body indeed has a robust immune system and various defense mechanisms (like skin barriers and secretions) that continuously work to protect against pathogens. - **Conclusion:** Statement III is **correct**. 4. **Select the Correct Option:** - Since all three statements (I, II, and III) are correct, we look for the option that includes all of them. - The correct option is **Option 4: All of these**. ### Final Answer: All statements (I, II, and III) are correct. Therefore, the answer is **Option 4: All of these**. ---
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