Q: In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.
Question: Regarding the tendon reflex of Golgi:
Options: <1> It is monosynaptic. <2> The receptors are in series with the extrafusal muscle fibers. <3> It is mediated by afferent fibers type la and ll. <4> Activates -motor neurons that innervate the muscle in which the receptor is located. <5> It is very sensitive to changes in muscle length.
A:
2