There are 3 types of robots in a laboratory. Type C can recognize color, S type can recognize shape, and X type can neither recognize color nor shape. All 3 types of robots can pick up experimental products according to simple commands. Robot No.1 and No.2 performed experiments. When they were ordered to pick up the red ball, No.1 picked up the red square, and No.2 picked up the blue ball. Based on the above experiment, which of the following assertions must be true? ['No.1 and No.2 are X type.', 'Neither 1 nor 2 is X type.', 'No.1 is type C and No.2 is type S.', 'No.1 is not S type and No.2 is not C type.']