Note: PreOrder means Root-Left-Right Traversal of tree.
By Option Elimination:-
B. False. Because $5$ is root so in preorder sequence first $5$ elements must contain $1$ to $5$ But $6$ comes here. So false.
So, now common things in option A,C,D is $5,3$ means $5$ root then LHS subtree root is $3$ . now $3$ s LHS is $1,2$ so they should come first rather than $4$. So option C is False.
Now Check for Option A,D.
Root $5$'s RHS is $6,7,8$ now as per Option A,D $7$ is Root so $6$ should be Left and $8$ should be Right so pre order for Right sub tree is $7,6,8$ (Root-L-R). This satisfies option D.
Correct Answer: $D$