Which of the following is the first sentence of the passage?

The correct order of the sentences is f, a, c, e, d and b . Here, a cannot be the first sentence of the passage, because ‘the article’ is mentioned, which refers to a specific article, which has already been mentioned. Also, ‘the sector’ is mentioned, and we don’t know which sector is being referred to. f gives answers to these questions and it can be the first sentence of the passage. a is the second sentence. The other sentences, except b talks about the views by authors. And sentence b talks about ‘these views’. So, it is the last sentence. When we look at c, d and e , c comes first and is the third sentence of the passage. e further explains what is mentioned in c . So, e follows c . d is the fifth sentence, followed by b .