Statement-I : X-ray can not be obtained from hydrogen atom.
Statement-II : Hydrogen atom has single electron.

Options

A. If both Statement- I and Statement- II are true, and Statement - II is the correct explanation of Statement– I.
B. If both Statement - I and Statement-II are true but Statement - II is not the correct explanation of Statement – I.
C. If Statement-I is true but Statement-II is false.
D. If Statement-I is false but Statement-II is true.

Answer

To solve the question, we need to analyze both statements provided:

**Statement-I**: X-ray cannot be obtained from hydrogen atom.
**Statement-II**: Hydrogen atom has a single electron.

### Step 1: Analyze Statement-II
- The hydrogen atom is indeed the simplest atom, consisting of only one proton and one electron. Therefore, **Statement-II is true**.

### Step 2: Analyze Statement-I
- X-rays are a form of high-energy electromagnetic radiation. For an atom to emit X-rays, there must be sufficient energy levels that allow for transitions that result in the emission of high-frequency radiation.
- In the case of hydrogen, the energy levels of its single electron are very close together. This closeness means that transitions between these energy levels do not result in the emission of high-energy photons like X-rays.
- Therefore, **Statement-I is also true**.

### Step 3: Determine the Relationship Between the Statements
- While both statements are true, Statement-II does not provide a correct explanation for Statement-I. Statement-II simply states a fact about hydrogen, while Statement-I discusses the inability of hydrogen to emit X-rays due to its electron configuration.

### Conclusion
- Both statements are true, but Statement-II does not explain Statement-I. Thus, the correct option for this question is that both statements are true, but Statement-II is not a correct explanation of Statement-I.

### Final Answer
- **Both statements are true, but Statement-II is not a correct explanation of Statement-I.**

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