Task: Question Answering
Input (English): Question: The brainstem or brainstem is the part of the Nervous System formed by: 
 Options:  <1> The mesencephalon, the protuberance and the medulla oblongata. <2> The spinal cord and the 31 pairs of cranial nerves. <3> The thalamus and the spinal cord. <4> The telencephalon, with the cerebral hemispheres. <5> The corpus callosum and the limbic system.
Output (English): 1