(B) Oribe, Underwood
(C) Paulsen, Oribe
(D) Rosen, Semonelli
(E) Underwood, Tan
*If Semonelli and Underwood are not assigned to seats in the same row as each other, which one of the following must be false?
(A) Norris is assigned to seat 2.
(B) Paulsen is assigned to seat 5.
(C) Rosen is assigned to seat 4.
(D) Tan is assigned to seat 2.
(E) Underwood is assigned to seat 1.
3.有关编组的问题
A jeweler makes a single strand of beads by threading onto a string in a single direction from a clasp a series of solid-colored beads. Each bead is either 美国GREen, orange, purple, red, or yellow. The resulting strand satisfies the following specifications:
If a purple bead is adjacent to a yellow bead, any bead that immediately follows and any bead that immediately precedes that pair must be red.
Any pair of beads adjacent to each other that are the same color as each other must be 美国GREen.
No orange bead can be adjacent to any red bead.
Any portion of the strand containing eight consecutive beads must include at least one bead of each color.
Question: