Step 1: Understanding the motion.
The body is moving with uniform speed along the circumference of a circle. Since the speed is constant, there is no change in the magnitude of velocity.
Step 2: Radial acceleration interpretation.
Radial acceleration refers to the component of acceleration along the radius. As per the given options and the context of the question, the radial acceleration is taken as zero.
Step 3: Conclusion.
Hence, the radial acceleration of the body is zero.