Assertion :Inhibition or death of one organism by another through the production of some by-products is known as antibiosis.
Reason: Antibiosis is a type of negative interaction.
In a negative interaction, one organism or both the organisms (associating) are harmed in any way during their life period. Antibiosis is a type of negative interaction in which complete or partial inhibition or death of one organism is taken place by the products of another organism Here, none of them derive any benefit, go, antibiotics derived from fungi are antagonistic to microbes. So, the correct answer is 'If both the assertion and reason are true but the reason is not a correct explanation of the assertion'.