Given below are four jumbled sentences. Select the option that gives their correct logical sequence. A. These are responsible for producing the major fuel used across the globe. B. The country has 100 major oil and gas fields. C. The economy of Saudi Arabia is based on petroleum. D. The chief oil field is Ghawar Field having an estimated 70 billion reserve resource.

Correct — A. Track what each sentence points back to.

C opens, because it names Saudi Arabia in full and depends on no earlier sentence.

B follows, because "The country" is a definite back-reference and needs a country already named.

A follows B, because "These" is plural and its antecedent is "100 major oil and gas fields".

D closes, because "The chief oil field" singles one out of that set, so it can only come after the set exists. The order is CBAD.

Why the others are wrong

• (b)
  ABCD — ABCD opens on "These", a plural pronoun with nothing before it to refer to. A paragraph cannot begin with a back-reference.
• (c)
  BACD — BACD opens on "The country", a definite phrase pointing at a country that has not yet been named anywhere.
• (d)
  DCAB — DCAB opens on "The chief oil field", which presupposes a set of fields, and it leaves B — the sentence introducing that set — until last.

Paragraph-jumble items are decided by cohesion markers, not by subject knowledge.

Three markers do most of the work. A definite article ("the country", "the chief oil field") points back to something already introduced. A demonstrative or pronoun ("these", "they", "it") needs an antecedent that matches it in number.

A connector ("however", "and now", "so") signals its relation to what came before.

The opener is normally the sentence carrying none of them, because it has to introduce its own subject from scratch.

Key facts

• "The country" in sentence B is a definite back-reference and needs Saudi Arabia named before it.
• "These" in sentence A is plural, so it must follow the plural noun phrase in sentence B.
• "The chief oil field" in D narrows a set, so it must follow the sentence that introduces the set.
• The keyed order CBAD runs from country to set of fields to their output to a single named field.

Common traps

• Ordering by how important each sentence sounds instead of by its reference chain.
• Reading "These" in sentence A as pointing at petroleum in C, which is singular, rather than at the fields in B.

No directly related past PYQ was found.