<p>OP · OQ, where O is the origin (P is on the circle and curve, Q is inside the circle with integer abscissa)</p>
Step-by-Step Solution
Key Concept: The dot product depends on the coordinates of both P and Q, where Q's position is constrained by being inside the circle with integer abscissa.
Using the dot product formula for position vectors from origin, and considering the constraints on P and Q (P on circle, Q inside circle with integer x-coordinate), the dot product OP · OQ can be either 4 or 2.
Correct Answer: b