Final answer:
Tibial torsion presents in the transverse plane and tibial varum presents in the frontal plane, which correspond to answer C in the provided choices.
Step-by-step explanation:
In which of the cardinal planes are tibial torsion and tibial varum present, respectively? The answer to this question is C) Tibial torsion: transverse plane; tibial varum: frontal plane.
Tibial torsion refers to the twisting of the bones in the lower leg, and this occurs in the transverse plane, which divides the body into upper and lower portions.
On the other hand, tibial varum, which is an angulation towards the midline of the lower legs (commonly known as bowlegs), is observed in the frontal plane.
This plane divides the body into anterior (front) and posterior (rear) portions.