Given below are two statement
Statement I: Boron is extremely hard indicating its high lattice energy
Statement II :Boron has highest melting and boiling point compared to its other group members.
In the light of above, statements, choose the most appropriate answer from the options given below.

Options

A. Statement I is correct but Statement II is incorrect
B. Both Statement I and Statement II are incorrect
C. Statement I is incorrect but Statement II is correct
D. Both Statement I and Statement II are correct

Answer

To solve the question, we need to evaluate the two statements provided and determine their correctness.

### Step-by-Step Solution:

1. **Analyze Statement I**:
- The statement claims that "Boron is extremely hard indicating its high lattice energy."
- Lattice energy refers to the energy released when gaseous ions combine to form an ionic solid. It is influenced by the size of the ions and the charge. Smaller ions tend to have higher lattice energy due to stronger electrostatic forces.
- Boron, being a small atom, forms strong covalent bonds in its crystalline structure, which contributes to its hardness. Therefore, this statement is **correct**.

2. **Analyze Statement II**:
- The statement claims that "Boron has the highest melting and boiling point compared to its other group members."
- Boron is the first element in Group 13 of the periodic table, and it has a unique structure that leads to strong covalent bonding. This results in a high melting and boiling point compared to its heavier group members like Aluminum, Gallium, Indium, and Thallium.
- Therefore, this statement is also **correct**.

3. **Conclusion**:
- Both statements are correct. Thus, the most appropriate answer is the option that states both statements are true.

### Final Answer:
Both Statement I and Statement II are correct.