5. In the sequence $20170 \cdots \cdots$, starting from the 5th digit, each digit is the unit digit of the sum of the previous 4 digits, and this sequence can continue indefinitely. Then, starting from the 5th digit, the array that will definitely not appear in the sequence is ( ).
(A) 8615
(B) 2016
(C) 4023
(D) 2017
Parse: Write out the sequence: $20170861502855088174023948 \cdots \cdots$, so the answer is B.
The original intention of this problem is to test the parity, the parity rule of each digit in the sequence is as follows: even even odd odd even even even odd odd even even even odd odd even even even odd odd even even even $\cdots \cdots$, starting from the 5th number, every five numbers form a cycle, the rule is even even even odd odd, the situation of even even odd even cannot appear, because odd numbers always appear consecutively in pairs.

Choose B.