, 2023

The number $M = 124563987$ is the smallest number which uses all the non-zero digits once each and which has the property that none of the pairs of its consecutive digits makes a prime number. For example, the 5th and 6th digits of $M$ make the number $63$ which is not prime. $N$ is the largest number which uses all the non-zero digits once each and which has the property that none of the pairs of its consecutive digits makes a prime number. What are the 5th and 6th digits of $N$?

(A) $6$ and $3$ (B) $5$ and $4$ (C) $5$ and $2$ (D) $4$ and $8$ (E) $3$ and $5$