The tree seldom grows more than 5 metres (16 feet) high and if not pru

I think the question needs to start with "The lime tree", and not just "The tree". Please update it.

Firstly, the question needs to start with "The lime tree" and not just "The tree".

Moving on, the question merely asks which of the answer choices is an apt inference.

A)Lemons are yellowish green in colour.
Incorrect : The passage says nothing about the colour of lemons.

B. Lime is a greenish yellow fruit.
Incorrect : The passage says it is yellowish green when ripe, it might be some other colour when raw. We can't decisively say it is generally a greenish yellow fruit.

C. Tropical countries are less likely to use limes.
Incorrect : Passage says that they are grown in some tropical countries, they might be used there itself, exported, etc., unclear and therefore incorrect.

D. Pruning is used to keep trees shrub-like.
Incorrect : Passage states the opposite.

E. Citric acid has a sour taste.
Correct : [excerpt : There are, however, some varieties so lacking in citric acid that they are known as sweet limes.] The passage states that varieties that lack citric acid are called sweet limes, implying that the ones with a good quantity of citric acid are sour.

Hello there..!
I went ahead with POE.
Options A & B describe about the Lemons and their colour. But we cannot really infer those statements.
Option C says that the Tropical countries are less likely to USE limes. We are given information just regarding the growing patterns, or rather, an information which states the tropical countries grow less of these. No where does it say anything about the USE. So we can eliminate this option.
Option D is actually a false statement. It is stated right in the first line of the argument.
So, E remains.
We have in the argument that an absence of Citric acid makes the fruits known as Sweet limes. So, the absence and presence have got to do with the taste.
Therefore, E hands-down...

Thank you!

Lacking citric acid means they are not sweet acxording to the passage.but not sweet doesnt mean sour necessarily,it may be sour it may be bitter.if we chose sour than thats an assumption and I have reservations for e as an answer

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I completely agree with that, but of the available options, does E not seem like the lesser evil?
What, in your opinion, is the right answer if not E?

I agree...! But that is an acceptable stretch we might wish to take. Between sour and bitter, it is an acceptable stretch in my opinion. So, E is the most plausible

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