Final answer:
The muscles that support the perineal body/central tendon of perineum are the puborectalis, pubococcygeus, and iliococcygeus, which are part of the pelvic diaphragm (Option C).
Step-by-step explanation:
The muscles of the perineal body / central tendon of perineum are an essential part of the pelvic floor and contribute to various physiological functions.
The correct muscles that support the perineal body and assist in maintaining the anus at the center of the perineum are identified in Puborectalis, pubococcygeus, and iliococcygeus.
These muscles are part of the pelvic diaphragm and work together with other structures to support pelvic organs, aid in urinary and fecal continence, and, in the case of males, contribute to ejaculation and, in females, to vaginal contraction.
Hence, the correct answer is Option C.