Choose the incorrectly spelt word.

Correct option is D

The correct spelling of the word is "Consummate".
• Consummate- showing a high degree of skill and flair; complete or perfect.
Meaning of the words given:
• Professional - relating to or connected with a profession; engaged in a specified activity as one's main paid occupation.
• Dubious - hesitating or doubting; not to be relied upon; suspect.
• Nefarious - (typically of an action or activity) wicked or criminal.