Answer:
The correct option is d) New capillaries
Explanation:
Myokines can be described as a type of cytokines which are produced by the myocytes at the time of muscle contraction. Different myokines regulate the skeletal muscles in a number of ways. For example, the myokine IL-8 helps in the formation of new capillaries which are the smallest blood vessels of the body.
Scientific studies have shown that there are almost 600 myokines in a person's body which are unknown and even their functions cannot be described.