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Ans (3): in understand banking

The error is in part (3) of the sentence. The verb ‘help’ can be followed by a gerund or a to-infinitive but has different meanings with both. In the given sentence, it requires a gerund and therefore, the use of base verb “understand” is incorrect. It should be replaced by ‘understanding’

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Ans (2): unless Ashok is

There is error in Part (2). The sentence talks about making a choice and not representing any condition to be met here. So, the use of ‘unless’ is incorrect. The correct word here would be ‘whether’.

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Ans (1): The power supplying in

There is error in Part (1). SUPPLYING should be replaced by SUPPLY. The action here is that of electricity being made available. We need a verb, in this case, supply. The sentence is written in present tense and the use of a continuous form of the verb is not needed.

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Ans (4): was decided by RBI early

Here, 'early' should be replaced by ‘earlier’.

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Ans (2): there is more internet users

‘Is’ should be replaced by ‘are’ The plural verb should be used.

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Ans (4): to cripple her logic

The error is in the fourth part of the sentence.

“Prevent” cannot be followed by 'to'. It should be followed by 'from' and a verb '-ing' form.

Therefore, ‘to cripple’ must be replaced by ‘from crippling’ to form a grammatically correct sentence.

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Ans (3): to meet with

The error is in the third part of the sentence.

“Meet” normally means 'come face to face with somebody or something'. If it is used in this way, it cannot be used with the preposition 'with' because the word itself conveys the sense of coming face to face.

Therefore, ‘with’ must be removed from the sentence to form a grammatically correct sentence.

The phrase ‘meet with’ means ‘to experience’ and ‘charge down’ means ‘to run towards something or someone’.

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Ans (2): at the book

The error is in the second part of the sentence.

The preposition ‘at’ is incorrect in the given context. The preposition ‘of’ must be used as it is used to denote belongingness.

Hence, ‘at’ must be replaced by ‘of’ to form a grammatically correct sentence.

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Ans (3): prevent her to do

The error is in the third part of the sentence.

It is because ‘prevent’ cannot be followed by 'to'.  It should be followed by 'from' and a verb '-ing' form.

Therefore, ‘to do’ must be replaced with ‘from doing’ to form a grammatically correct sentence.

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Ans (4): to discuss about various issues

The error is in the fourth part of the sentence.

Verbs such as ‘enter’, ‘resemble’, ‘lack’, ‘discuss’, ‘marry’, ‘reach’, ‘order’, ‘approach’ etc. are followed by direct objects without prepositions.

Therefore, about must be removed from the sentence to form a grammatically correct sentence.