He is one of the talkative boy in the class

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Explanation:

1) When we say climb, we do not use up/upon/on etc Climb it self mean going up gradually and it would imply the person could not climb up tree.

2) We do not use are with subject names that end with s, since they are singular, although they end with s, examples linguistics, mathematics, physics,  ethics etc.

3) We use prefer to when the comparison is between noun-to-noun  and when comparing one's preference of two things.

4)  When we use an adjective in the superlative degree (richest) before the noun, we must use it with definite article the. This is because there is only one of the thing that is spoken about (Something specific).

5) One refers to one boy out of a group of several/many boys. When the part of a group is referred to, it  cannot be referred to in singular

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india defeated pakistan by innings. spot the error and correct it ...

He is the most talkative boy in the class

hey mate... here is ur answer.

he is one of the most talkative boy in the class

hope it helps u

Hi!!

Here is your answer

He is one of the most talkative boys in the class.

The tree is so tall that we cannot climb on it.

Economics is my favourite subject.

I prefer coffee more than/rather than tea.

My uncle is the richest man in the village.

He is one of the most talkative boys of the class.

hope it helps

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