The answer is E
The A/P palatal strap design can be used in almost any maxillary partial denture design. Thus 1. is false. The posterior strap should be flat and a minimum of 8-12 mm wide. Thus 2 is false. They should be located as far posterior as possible but NEVER on moveable tissues. And they should cross the midline at a right angle; the tongue will not appreciate an asymmetric appliance as readily. So #3 is true. An inoperable maxillary torus may not allow one to use an A-P design but some tori are negotiable. So #4 is false. Flexure is practically nonexistent as each component braces the others against possible torque and flexure. So #5 is true. And finally the A-P strap design is most often used for Class II and IV Kennedy classes. With the single wide palatal strap used for the Kennedy Class III’s.
SOURCE: McCRACKEN’S REMOVABLE PARTIAL DENTURES page 52-54.
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