AbhishekDhanraJ72 wrote:
someone explain why E is wrong??
Let's take a look at the passage before we examine why (E) is wrong. The argument in the passage is:
- Carotene (a fat-soluble vitamin A precursor) give buttermilk its yellowish color (mmm... buttermilk )
- Different butterfats are different shades of yellow
- Some breeds of cow are better than others at converting carotene into vitamin A
- Vitamin A is colorless
The information in the passage and the knowledge that butter made from Holstein cows' milk is much paler than that made from the milk of Jersey or Guernsey cows suggests one of the answer choices is true. It's our job to find this answer choice.
(E) tells us:
Quote:
(E) the carotene in the milk of holsteins is less fat-soluble than the carotene in the milk of jerseys or guernseys
There is no information in the passage about how the level of fat-solubility of the carotene in a cow's milk affects the color of the buttermilk. We can't tell whether changing how fat-soluble the carotene in a cow's milk would change the color of the milk. All we can infer is that
more carotene will make
make a cow's buttermilk more yellow.Since the information in the passage does not suggest that holsteins have less fat-soluble carotene in their milk than Jerseys or Guernseys, we can rule (E) out.
Compare this to (B):
Quote:
(B) there is more vitamin A in the butterfat of holsteins than in the butterfat of jerseys or guernseys
The passage tells us that carotene gives buttermilk its yellowish color. The question tells us Holsteins produce paler milk than Jerseys or Guernseys. From these two pieces of information, we can infer that the butter made from Holstein's milk contains less carotene that the butter made from Jersey's or Guernsey's milk.
From the information in the passage we can't tell how much carotene each breed of cow produces. What we can say is that the Holsteins are more efficient at converting carotene into the colorless vitamin A. This is why Holstein buttermilk is paler than Jersey or Guernsey buttermilk. (Mmm... buttermilk.
)
The information in the passage suggests (B) is true, so (B) is the answer to this question.
I hope that helps!
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