Task: Question Answering
Input (English): 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 α-motor neurons that innervate the muscle in which the receptor is located. <5> It is very sensitive to changes in muscle length.
Output (English): 2