The pubic region is to the gluteal region as the anterior is to the posterior.
Explanation: In anatomical terminology, the term ‘anterior’ refers to the front of the body, while ‘posterior’ refers to the back. The pubic region is located towards the front of the body (anterior), whereas the gluteal region is located towards the back (posterior). Therefore, the correct way to complete the statement is by indicating this front-to-back relationship.