Select an appropriate title for the passage.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. The Probability of Life on Mars.
Line to Refer: “...tempt scientists to believe that Mars harbours life—or did so in the past.”
“...75 per cent of the scientists said they thought life once existed there, and of them, 25 per cent think that Mars harbours life today.”
The most appropriate title is "The Probability of Life on Mars". It is the best choice, as the passage is about the chances and scientific beliefs about life on Mars.
Hence, the chosen option will be correct.