Task: Question Answering
Input (English): Question: The molecules of the CD1 family (CD1a, CD1b, CD1c, CD1d and CD1e) are expressed in: 
 Options:  <1> All the cells of the organism. <2> Only in dendritic cells. <3> Only in macrophages. <4> Only in monocytes. <5> Some thymocytes, in dendritic cells, in monocytes and macrophages.
Output (English): 5