English

The correct preposition to use with 'bound' when indicating a destination is 'for'. Therefore, 'This flying coach is bound for Karachi.' is correct.

The correct verb to describe the Sun appearing from behind the clouds is 'emerged,' which means to come out or appear. 'Immerse' means to involve deeply or submerge, and 'Imerged' is not a correct English word. 'None of These' is incorrect since 'Emerged' fits perfectly.

The correct conjunction to explain the reason why you do not have to walk to the house is 'because'. 'So that' is used to express purpose, but the sentence context indicates a reason, making 'because' the appropriate choice.

The sentence 'The teacher made the naughty boy ______.' requires a bare infinitive verb after 'made' as it is a causative verb. The correct form is 'tiptoe' (bare infinitive), so option A is correct. Options B and C are incorrect because 'tiptoes' is a noun or third person singular verb form, and 'to tiptoe' is the full infinitive, which is not used after 'made'. Since 'None of these' is option D, and option A is correct, the correct answer should be A.

The word "prosaic" means dull, unimaginative, or lacking in excitement, which corresponds to option B. It does not mean good or beautiful, and "None" is not a valid choice here.

The word 'Controversial' best fits the context of the sentence, as it describes the type of bold questions a journalist might ask that others avoid. 'Irrelevant' questions would not make sense here because irrelevant questions are unrelated, not necessarily bold or challenging.

The verb 'interfere' is correctly followed by the preposition 'in' when referring to involvement in someone's personal affairs or matters. The phrase 'Please do not interfere in my personal affairs.' is the correct usage. 'Interfere with' is more commonly used when referring to hindering or obstructing something, but 'interfere in' is appropriate for meddling in personal or private matters. The options 'of', 'about', and 'on' are incorrect in this context.

The word 'apposite' means appropriate or suitable in the circumstances. Therefore, the synonym 'Appropriate' (option D) is correct.

The term 'Ignorant' correctly describes a person who lacks knowledge. The other options do not fit this meaning: 'Intelligent' means having intelligence, 'Credulous' means too ready to believe, and 'Colleague' means a workmate.

The word 'diffident' means shy or lacking self-confidence, so the synonym 'shy' (option B) is correct. The other options do not convey the same meaning.