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<p>Depends… many college chemistry and physics courses do recommend high school chemistry and physics as prerequisites. So if the AP courses are college level (in theory), then the prerequisites should be high school courses in those subjects.</p>
<p>On the other hand, for chemistry, AP chemistry is often seen as equivalent to a semester of college chemistry at most. In theory, an accelerated high school chemistry course for motivated students can take a year to cover high school and first semester college chemistry topics without overstressing the students.</p>
<p>In physics, the B version is intended to be like a lower level physics course for biology majors which is less likely to specify high school physics as a prerequisite. So it may be reasonable to offer it as an honors high school physics course (which some high schools do). The C version is intended to be like an introductory physics course for engineering and physics majors which is more likely to specify high school physics as a prerequisite. In practice, many colleges do not accept them for subject credit anyway (or have very limited acceptance), due to the colleges’ own physics courses having higher math prerequisites than the AP courses have.</p>