Name the type of filaments which contitute A-bands (dark bands) of striated muscle fibres.

Explanation

### Step-by-Step Solution:

1. **Understanding Muscle Structure**: Striated muscle fibers, also known as skeletal muscles, have a specific structure that includes repeating units called sarcomeres. Each sarcomere contains different bands that are important for muscle contraction.

2. **Identifying the A-band**: Within the sarcomere, there are two types of bands: the A-band (dark band) and the I-band (light band). The A-band is characterized by its darker appearance under a microscope.

3. **Composition of the A-band**: The A-band is primarily made up of thick filaments. These thick filaments are composed of a protein called myosin.

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