A. [2, 6, 4]
B. [1, 3, 2, 1, 3]
C. [1, 3, 2, 1, 3, 2]
D. [1, 3, 2, 3, 2, 1]

Solution

C. [1, 3, 2, 1, 3, 2]

Explanation

Execute in the shell and verify.