To answer the question about which population interaction is widely used in medical science for the production of antibiotics, we need to understand the different types of population interactions listed in the options. The options given are:
From these definitions, we can reason that Amensalism is the correct answer. In medical science, the most relevant example is the production of antibiotics by fungi like Penicillium and bacteria like Streptomyces, which inhibit or kill other microorganisms, an application widely used to control bacterial infections in humans.
Therefore, the correct answer is Amensalism.