Answer:
<u>A. Antibiotic Y</u>
Explanation:
Kirby-Bauer assay is used to determine the susceptibility of an organism to the given antibiotics. It determines susceptibility by the diameter of zone of inhibition around antibiotic disks. Since the zone of inhibition of Antibiotic Y is greater than the Antibiotic X so Antibiotic is better or more powerful in killing this particular microorganism.
The Hypothalamus is responsible for licking and eating reflexes. The licking reflex is seen only certain animals but the centers are located in the medulla oblongata in the lower brainstem.
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