
Passage: There are three types of robots A, B and C in a laboratory. Type A can recognize color, type B can recognize shape, and type C can neither recognize color nor shape. The laboratory experimented with red ball, blue ball, red square and blue square on robots 1 and 2 and ordered them to pick up the red ball, but 1 picked up the red square and 2 picked up the blue ball.
Question: Which of the following options is correct according to the above experiment?
A. A.Both 1 and 2 are type C
B. B.One and only one of 1 and 2 is type C
C. C.1 is type A and 2 is type B
D. D.1 is not type B and 2 is not type A
Answer: