Who among the following made experiments on Weber's Law and Sensory discrimination?

Answer: Option B

Weber's Law and sensory discrimination are important concepts in psychology that explore how we perceive differences in sensations.
This question asks who conducted experiments related to these concepts.
Option A: John Locke is a famous philosopher, but not directly associated with experiments on Weber's Law.
Option B: Weber Guster Fechner is the correct answer. Gustav Fechner built upon the work of Ernst Weber, and together their research led to the formulation of Weber's Law, which describes the relationship between the magnitude of a stimulus and the just noticeable difference in that stimulus.
Option C: David Hume is another influential philosopher but is not linked to these specific experiments.
Option D: Helmhotz made significant contributions to science, but his primary focus wasn't on these particular experiments on Weber's law and sensory discrimination.
Therefore, the experiments on Weber's Law and sensory discrimination were primarily conducted by Weber and Fechner.