Final answer:
The upper calf waveform should be monophasic.
Step-by-step explanation:
The correct answer is b) Monophasic.
In the context of calf waveforms, a monophasic wave refers to a waveform that has only one phase or component.
In contrast, a triphasic waveform would have three phases or components, a biphasic waveform would have two phases or components, and a quadriphasic waveform would have four phases or components. However, in the context of calf waveforms, the upper calf waveform is typically monophasic, meaning it has only one phase or component.