Step 1: Understanding the Diameter.
The centre of the circle divides the diameter into two equal parts. This is a fundamental property of circles, as the diameter is always bisected by the centre.
Step 2: Verifying the Options.
- Option (1): The diameter is divided into two equal parts at the centre.
- Option (2): This is incorrect, as the diameter is always divided equally.
- Option (3): The ratio is not 1:2.
- Option (4): The ratio is not 2:3.
Conclusion:
Therefore, the correct answer is (1) Two equal parts.