Which of the following statements is/are true in the context of the passage?
I. Man should be passive in his attitude to life.
II. Spirit of inventiveness may not stand in good stead in solving every new problem.
III. Man has a passion for more and more knowledge.

The correct answer is Only III.

Let's analyze each statement based on logical reasoning and reading comprehension principles:

Statement I: "Man should be passive in his attitude to life."
This statement is generally false and incorrect in an active, problem-solving context. Human progress relies on an active and engaged approach to life, not a passive one.

Statement II: "Spirit of inventiveness may not stand in good stead in solving every new problem."
This statement is incorrect as human ingenuity and an inventive spirit are essential tools for overcoming novel challenges and solving new problems.

Statement III: "Man has a passion for more and more knowledge."
This statement is true. A defining characteristic of humanity is the continuous pursuit of learning, curiosity, and the desire to acquire greater knowledge.

Therefore, only Statement III is true, making Only III the correct choice.