The correct statements among I to III regarding group 13 element oxides are,
(I) Boron trioxide is acidic.
(II) Oxides of aluminium and gallium are amphoteric.
(III) Oxides of indium and thallium are basic.

Options

A. (I) and (II) only
B. (I),(II) and (III) only
C. (I) and (III) only
D. (II) and (III) only

Answer

To determine the correct statements regarding the oxides of group 13 elements, we will analyze each statement one by one.

### Step 1: Analyze Statement I
**Statement I: Boron trioxide is acidic.**

- Boron (B) is a non-metal, and its oxide, boron trioxide (B₂O₃), behaves as an acidic oxide. Non-metal oxides are generally acidic in nature. Therefore, this statement is **correct**.

### Step 2: Analyze Statement II
**Statement II: Oxides of aluminium and gallium are amphoteric.**

- Aluminium (Al) and gallium (Ga) oxides, namely Al₂O₃ and Ga₂O₃, can react with both acids and bases. This property classifies them as amphoteric oxides. Therefore, this statement is also **correct**.

### Step 3: Analyze Statement III
**Statement III: Oxides of indium and thallium are basic.**

- Indium (In) and thallium (Tl) are metals, and their oxides (In₂O₃ and Tl₂O₃) tend to exhibit basic properties. As we move down the group, the metallic character increases, leading to more basic behavior in their oxides. Therefore, this statement is also **correct**.

### Conclusion
Since all three statements are correct, the correct option is:

**Option B: First, second, and third statements are correct.**

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