From the words lettered A to D below each of the following sentences, choose the word or group of words as it…

Analyze the question: This is a preposition question. We need the preposition that correctly follows the noun "degree" when it names a subject area: "a degree ___ medicine."

Concept: In English, we use "degree in" + subject to show the field of study.

• a degree in law
• a degree in engineering
• a degree in medicine

Other prepositions do appear with "degree," but with different meanings:

• degree of describes extent or amount (e.g., "a high degree of accuracy").
• degree from names the institution (e.g., "a degree from the University of Ibadan").

Testing each option:

• A. "a degree on medicine" is wrong. "On" is not used to name a field of study here.
• B. "a degree for medicine" is not idiomatic. "For" does not name the subject of a degree.
• C. "a degree of medicine" is not the standard form for the subject of study. "Of" appears in fixed titles like "Doctor of Medicine," but not in this sentence.
• D. "a degree in medicine" is correct and idiomatic.

Completed sentence: "You must obtain a degree in medicine to become a doctor."

Tip: Remember the pattern "degree in + subject" (a degree in Physics, a degree in Accounting). If the sentence names an institution, use from. Also, "of" is used mainly in formal degree titles like "Bachelor of Science."