Definition: 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'.
Input: Question: The specialized type of soft and diffuse connective tissue, called myeloid tissue, is also called: 
 Options:  <1> Spinal cord. <2> Bone marrow. <3> Myelin <4> Endochondral marrow <5> Leukomyelin
