Question

Find the correct statement according to the passage.

• A. Though there is no evidence of organics at Yellowknife Bay site yet the possibility of life over there cannot be ruled out.
• B. There can be no life without carbon or organic compound.
• C. Even micro-organisms cannot exist in geological environment where there is complete lack of organics.
• D. The presence of water confirms the existence of life on Mars.

Hint:

When options contain absolutes like "cannot be" or "confirms," they are usually traps in RC-based inference questions.

Answer 1

The Correct Option is A

The passage says: "A lack of organics, however, would not rule out the Yellowknife Bay site as suitable for life." This exactly matches (a). (b) is incorrect, since scientists said carbon need not be present in a habitable geological environment. (c) contradicts the passage (chemoautotrophic microbes can survive on inorganic compounds). (d) is also false, since water only hints at conditions for life, not proof of life. \[ \Rightarrow \boxed{(a)} \]

Answer 2

Match each option word-for-word against a specific quoted claim in the passage, rather than assessing plausibility in general terms.

1. Option A: this restates the passage's own statement that "a lack of organics... would not rule out the Yellowknife Bay site as suitable for life," almost verbatim, so it is directly supported.
2. Option B: the passage indicates chemoautotrophic microbes can survive without carbon-based organics being present, so a blanket claim that life is impossible without carbon directly contradicts the passage.
3. Option C: the passage states organisms can feed on inorganic compounds in a completely organics-free geological environment, directly contradicting this option's claim of impossibility.
4. Option D: the passage treats water only as one favourable condition among several, not as confirmation of actual life, so this option overstates what water's presence proves.

Only option A is a direct match to an explicit statement in the passage, while the other three each contradict something the passage states.

Hence, the correct answer is Though there is no evidence of organics at Yellowknife Bay site yet the possibility of life over there cannot be ruled out.