Final answer:
Touch receptors, specifically Pacinian corpuscles, are the most studied examples of phasic receptors that detect transient pressure and high-frequency vibration.
Step-by-step explanation:
The type of receptor that matches the description of being the most studied examples of phasic receptors called Pacinian corpuscles is Touch receptors (B). Pacinian corpuscles are encapsulated, rapidly adapting receptors that detect transient pressure and high-frequency vibration. They are found in areas of the body that are sensitive to touch, such as the fingertips and lips.