What should be the age of fossil for meaningful determination of its age? — Nuclear Chemistry and Radioactivity Chemistry Question

💡 Solution & Explanation

The passage specifically states that the method ceases to be accurate over periods longer than 30,000 years. 6 years is too short to observe measurable decay, while 60000 years exceeds the limit. 6000 years represents approximately one half-life, which provides an easily measurable and meaningful change. Therefore, correct answer is B.