PT 20 S3 Q18

A jeweler makes a single strand of beads by threading onto a string in ... ...

If on an eightbead strand the first, second, third, and fourth beads from the clasp are red, yellow, green, and red, respectively, then the fifth and sixth beads CANNOT be
(A) green and orange, respectively
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Sequencing: Lesson Set 5 (of 5) - Repetition/Omission