All potatoes naturally contain solanine, which is poisonous in large

Question

All potatoes naturally contain solanine, which is poisonous in large quantities. Domesticated potatoes contain only very small amounts of solanine, but many wild potatoes contain poisonous levels of solanine. Since most of the solanine in potatoes is concentrated in the skin, however, peeling wild potatoes makes them at least as safe to eat as unpeeled domesticated potatoes of the same size.

Which one of the following, if assumed, allows the conclusion above to be properly drawn?

(A) The proportion of a potato's solanine that is contained in its skin is larger in wild potatoes than in domesticated potatoes.

(B) The amount of solanine concentrated in the skin of a wild potato is large enough by itself to be poisonous.

(C) There is no more solanine in a peeled wild potato than in an unpeeled domesticated potato of the same size.

(D) There are no poisonous substances in domesticated potatoes other than solanine.

(E) Wild potatoes are generally much smaller than domesticated potatoes.

Abhishek009 · Answer

CLIP.png From the last row in the picture we are assuming that the Body of Wild Potate doesn't contain more Solanine, hence option (C) fits in perfectly... Negate the options : There is no more solanine in a peeled wild potato than in an unpeeled domesticated potato of the same size. Thus from the statement the conclusion " peeling wild potatoes makes them at least as safe to eat as unpeeled domesticated potatoes of the same size." is clearly attacked , hence correct Answer must be (C)

Shwetabh54 · Answer

Prethinking - Peeled wild potato solanin's content must be less than or equal to solanin's content of unpeeled domestic potato. This needs to be true for conclusion to hold true.

Option B,D and E are not at all bridging the gap or helps author to reach his conclusion.
Option A - We know that the solanin's content in wild potato is higher than domesticated. Which means if wild potato has 51% solanin in skin and domesticated potato has 50% solanin in the skin then there may be case in which peeled wild potato (49% solanin) can exceed solanin content of unpeeled domestic potato, since the content in wild potato is high. Hence it somewhat in line but not Must be true

Option C - Same as our prethinking.

dp1234 · Answer

Premise: All P contain S. S in large qty is danger. 
 Dom P contain small qty S. Many wild P contain poisonous level of S. 
 Most of S is found in skin. 
Conclusion : Peeled wild P are safe as unpeeled dom P to be consumed. (same size P)

A: The proportion of solanine in skin: wild potato > domesticated potato. But that doesn't mean that in other part of wild potato it is low enough to be non poisonous and can be consumed. So it can't be assumption

B: So solanine in skin of wild potato is large enough to be poisonous. But it doesn't say levels of solanine in other parts (non peeled wild potato) are not low to be safe.

C: It says solanine levels : peeled wild potato =< unpeeled domesticated potato of same size. This means wild peeled are safe to eat just as unpeeled domesticated ones. CORRECT.

D: It states nothing about wild potatoes which we are trying to find about. Not relevant

E: Even if they are smaller, we are doing the same size comparison. Not relevant.

All potatoes naturally contain solanine, which is poisonous in large

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All potatoes naturally contain solanine, which is poisonous in large

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