**Core Concept**
Myosin and actin filaments are crucial components of muscle fibers, playing a pivotal role in muscle contraction and relaxation. The organization and maintenance of these filaments are essential for muscle function. Specifically, the actin filaments are anchored to the Z-disks (also known as Z-lines), while myosin filaments are associated with the M-line.

**Why the Correct Answer is Right**
The correct answer is related to the anchoring proteins that maintain the structure and organization of the sarcomere, the functional unit of striated muscle tissue. The sarcomere is composed of actin filaments (thin filaments), myosin filaments (thick filaments), and associated proteins like titin, nebulin, and alpha-actinin. Alpha-actinin specifically interacts with actin filaments and anchors them to the Z-disks, thus maintaining the organization of the sarcomere.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because troponin and tropomyosin regulate muscle contraction by controlling myosin binding to actin, but they do not anchor the filaments in place.
* **Option B:** This option is incorrect because dystrophin is a protein that anchors the cytoskeleton to the extracellular matrix in muscle cells, but it is not responsible for anchoring myosin and actin filaments within the sarcomere.
* **Option C:** This option is incorrect because myomesin is a protein that interacts with myosin and titin, but it does not anchor actin filaments to the Z-disks.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that the Z-disks are crucial for maintaining the organization of the sarcomere, and disruptions to the Z-disks, such as in muscular dystrophy, can lead to muscle weakness and degeneration.

**Correct Answer: C. Myomesin is incorrect, the correct answer is actually alpha-actinin.**