The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Antibiosis is a type of negative or antagonist interaction. This interaction occurs between two organisms or between an organism and metallic substance produced by another. In this interaction, one of the organism gets harmed. For example, the interaction between antibiotic and bacteria. Antibiotics are the chemicals produced by bacteria which causes death or inhibition of the bacterial growth. So, the correct answer is option A.