Select the most appropriate option to fill in the blank.

My neighbour was admitted to the hospital when he developed an allergic ______ to some medicine he took.

reaction

My neighbour was admitted to the hospital when he developed an allergic reaction to some medicine he took.

Explanation:

• Reaction: This is the correct word choice. "Reaction" refers to a response or change that occurs due to a stimulus, in this case, an allergic response to the medicine.

• Result: This word refers to the outcome or consequence of an action or event. It's not the best fit in this context, as "allergic result" doesn't convey the same meaning as "allergic reaction."

• Retort: This word means a sharp or witty reply. It doesn't fit the context of discussing a medical situation.

• Rejoinder: This word means a reply or response, often in a conversation or argument. It doesn't fit the context of describing an allergic response to medicine.