Which edge case matters for this problem?

Question

Which edge case matters for this problem?

Option A — Correct answer

n = 2 and n = 3 have no valid boards.

Option B

Whether the graph has weighted edges

Option C

Whether the array is rotated

Option D

Whether the string has vowels

Explanation

n = 2 and n = 3 have no valid boards.

N-Queens - Constraint Backtracking Pattern Practice Quiz