In the following sentence, one numbered part may contain a grammatical error, or the sentence may be fully correct. Choose the number of the part that has an error, or choose option (4) for No Error. Sentence: I had forgotten all such things just (1) / for the sake of the greater good of everyone. (2) / said their leader. (3)

Introduction / Context:
This sentence correction question tests proper use of pronouns and punctuation around reported speech. The sentence quotes a leader speaking in the first person and then identifies who is speaking. The original stored version used the wrong possessive pronoun there instead of their in the tag said their leader. Correct possessive pronoun usage is an essential part of English grammar.

Given Data / Assumptions:

• The sentence is divided into three numbered parts plus a No Error option.
• Part (1) contains the beginning of the quoted speech: I had forgotten all such things just.
• Part (2) continues the quotation: for the sake of the greater good of everyone.
• Part (3) contains the reporting clause: said their leader.

Concept / Approach:
The main concept is the difference between there and their. There is used to refer to a place or to introduce an existential clause, whereas their is the possessive determiner used to show that something belongs to a group of people. In the reporting clause said their leader, the leader belongs to or is associated with them, so the correct word is their leader, not there leader. The error therefore lies in part (3).

Step-by-Step Solution:
Step 1: Read the content of the quotation in parts (1) and (2): I had forgotten all such things just for the sake of the greater good of everyone. This is grammatically correct and coherent.Step 2: Turn to part (3), which identifies who is speaking: said their leader. In the stored version, this was said there leader, which is wrong.Step 3: Recognise that leader is a noun that needs a possessive determiner to show relationship to the group, which is expressed by their.Step 4: Recall that there is not a possessive determiner and would not make sense before leader in this context.Step 5: Therefore, identify part (3) as containing the pronoun error.Step 6: Mentally correct the full sentence to I had forgotten all such things just for the sake of the greater good of everyone, said their leader.

Verification / Alternative check:
To verify, consider similar reporting clauses: said their teacher, said their captain, said their manager. All of these use the possessive determiner their. Using there in any of those phrases would be ungrammatical. Also, notice that parts (1) and (2) form a complete and grammatically correct statement, leaving part (3) as the only possible location for an error. This confirms that the pronoun in part (3) is the problem.

Why Other Options Are Wrong:
Option 1: Part (1) correctly uses the past perfect had forgotten and introduces the purpose clause just for the sake of.Option 2: Part (2) correctly finishes the purpose clause with of the greater good of everyone and does not contain an error.Option 4: Since part (3) clearly contains a wrong pronoun in the original version, the sentence is not error free, so No Error is not the right option.

Common Pitfalls:
Because there and their are homophones, they are frequently confused in writing. In examination settings, this confusion is deliberately exploited in error spotting questions. A common pitfall is reading quickly and mentally correcting the word without noticing the spelling. To avoid this, train yourself to look carefully at function words, not just content words, and to ask whether a possessive relation is being indicated, which would require words like my, your, his, her, its, our, or their.

Final Answer:
The incorrect pronoun appears in the third part, so the correct option is 3.