Which of the following is incorrect?

Options

A. Number 0 has both rotational and line of symmetry
B. Shape kite has only one line of symmetry.
C. A square has four lines of symmetry and rotational symmetry of order 2.
D. A rectangle has finite number of lines of symmetry.

Answer

To determine which of the statements is incorrect, let's analyze each option step by step.

### Step-by-Step Solution:

1. **Option 1: Number zero has both rotational and line of symmetry.**
- The number zero is symmetrical about both the vertical and horizontal axes. It also looks the same when rotated 180 degrees.
- **Conclusion:** This statement is **correct**.

2. **Option 2: Shape kite has only one line of symmetry.**
- A kite has a vertical line of symmetry that divides it into two identical halves.
- **Conclusion:** This statement is **correct**.

3. **Option 3: A square has four lines of symmetry and rotational symmetry of order two.**
- A square indeed has four lines of symmetry (two diagonals and two midlines). However, it has rotational symmetry of order **four**, not two. This means it can be rotated at 0°, 90°, 180°, and 270° and still look the same.
- **Conclusion:** This statement is **incorrect**.

4. **Option 4: A rectangle has a finite number of lines of symmetry.**
- A rectangle has two lines of symmetry (one vertical and one horizontal). The term "finite" refers to a countable number, and since we can count the lines of symmetry, this statement is true.
- **Conclusion:** This statement is **correct**.

### Final Answer:
The incorrect statement is **Option 3**: "A square has four lines of symmetry and rotational symmetry of order two."