Answer the following question below and choose the option that best completes the gap(s) This professor of…

Analyze the question: This is a spelling (orthography) question. You must pick the option where both words are spelled correctly.

Concept:

• The word for medicine concerning animals is veterinary: vet-er-i-nar-y.
• The past participle of "unravel" is spelled unravelled in British English, which Nigerian examinations follow. The final "l" is doubled before the suffix -ed. American English uses "unraveled", but JAMB and WAEC follow British spelling.

Step-by-step check:

• A. vetinary / unraveled: "vetinary" is missing the "er" (should be veterinary). Also, "unraveled" is American spelling. ❌
• B. vertrinary / unravelled: "vertrinary" is misspelled. ❌
• C. veterinaty / unravelvved: "veterinaty" ends with "t" instead of "r", and "unravelved" is not a word. ❌
• D. veterinary / unravelled: both are correct British spellings. ✅

Answer: The sentence reads: "This professor of veterinary medicine has unravelled the mystery of bird flu."

Tip: Break up "veterinary" as vet-er-i-nar-y and remember that it has "vet" at the start. For British spelling, remember that verbs ending in a single vowel plus "l" usually double the "l" before -ed or -ing (travel → travelled, cancel → cancelled, unravel → unravelled).