Choose the word which is the opposite to the underlined word in the following sentence:
Though a novice in this field, he shows great promise.

• Concept: Antonyms are those words that have contrasting or opposite meanings to the given word.
• Novice used for a  person who is inexperience or new to situation or a job.
• Option C: 'Veteran' used for a person who has had long experience or old in a particular job or situation, so it is the correct answer.
• Tyro and  inexperience both means novice
• Greenhorn is Synonym to novice.

 Hence, option C is the correct answer.