Final answer:
It is not specified when New Zealand won a Test match, and therefore, none of the provided options (a) 15 years, (b) 25 years, (c) 37 years, or (d) 50 years can be confirmed.
Step-by-step explanation:
The question lacks specific information about when New Zealand won a Test match, making it impossible to determine the correct answer among the given options. Winning a Test match depends on various factors, including the team's performance, opponents, and the timeline of matches played.
To provide an accurate answer, details such as the specific Test match, the opposing team, and the year of victory would be required. Cricket statistics are time-sensitive and subject to change based on ongoing matches and series.
In real-world scenarios, cricket enthusiasts and statisticians refer to reliable databases, historical records, and official cricket boards to obtain up-to-date and accurate information about a team's performance, including the duration it took for them to achieve significant milestones like winning a Test match. In the absence of such details in the question, the final answer emphasizes the need for specific information to determine the duration it took for New Zealand to win a Test match.