- A(a)
- B(b)
- C(c)
- D(d)
Step-by-Step Solution
The third wheel keeps the spokes of the first wheel after removing every spoke that also appears in the second wheel. In the bottom row the first wheel has five spokes (right, upper-right, up, upper-left, left) and the second has right and left, so up, upper-right and upper-left remain: (c). (a) shows the removed spokes, (b) keeps the left spoke and (d) adds a spoke.
Answer: C) (c)