Which of the following statements are true about antibiotics?
I. Destroys the useful bacteria in the body.
II. Reduces quantity of some vitamins within the body.

Only I

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Only II

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Both I and II

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Both I are II are wrong

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Solution

The correct option is C
Both I and II

An antibiotic is a chemical substance that inhibits the growth and also kills a microorganism. However, microorganisms are evolving and can adapt easily.
Thus, the given antibiotic will have no effect on the pathogen after a while. As a result, increased quantity of antibiotics kills good bacteria and reduce the important vitamins in the body.

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Statement I: Power = $\frac{V^{2}}{R}$ is used only when the potential difference across the resistors are constant.

Statement II: Power = $I^{2}$ R is used only when current in the resistors are constant.

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Conclusions:

I. D $$$ Y
II. R @ U

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