Error spotting in subject verb agreement: Sita with all her sisters were here. Identify which part of the sentence is grammatically wrong or state that there is no error.

Introduction / Context:
This error spotting question checks subject verb agreement in a sentence where a singular noun is followed by an additional phrase beginning with with. Candidates must decide whether the verb should be singular or plural, focusing on who or what is the real subject of the sentence. Such structures are common in English and often cause confusion because there seems to be more than one person in the subject phrase.

Given Data / Assumptions:
- Sentence: Sita with all her sisters were here.
- Part (a): Sita
- Part (b): with all her sisters
- Part (c): were here
- Part (d): No error
We assume we are following the usual rule that prepositional phrases beginning with with do not change the number of the main subject.

Concept / Approach:
When a singular noun is followed by a phrase beginning with with, along with, together with, or as well as, the verb agrees with the first noun, not with the phrase that follows. So in the subject Sita with all her sisters, the true grammatical subject is Sita, which is singular. Therefore, the verb must be singular was, not the plural were. The extra information with all her sisters simply adds detail and does not control verb agreement.

Step-by-Step Solution:
Step 1: Identify the main subject: Sita is a singular proper noun referring to one person. Step 2: Recognise that the phrase with all her sisters is a prepositional phrase adding additional information about company. Step 3: Apply the rule of agreement: The verb must agree with Sita, not with sisters. Step 4: Examine part (c) were here. Were is the plural past form of be, which does not agree with the singular subject Sita. Step 5: The correct form should be was here, so part (c) is grammatically wrong. Step 6: Parts (a) and (b) are structurally correct and need no change.

Verification / Alternative check:
We can rewrite the sentence correctly as: Sita, with all her sisters, was here. Now the sentence clearly shows that Sita is the main subject and that the verb was matches this singular subject. Another way to check is to temporarily remove the with phrase and read Sita was here, which is clearly correct. This simple deletion test is a powerful technique to verify agreement in such questions.

Why Other Options Are Wrong:
- Error in part (a) only: The name Sita is correct and capitalised, so there is no error in part (a).
- Error in part (b) only: The phrase with all her sisters is acceptable and correctly formed, so this option is wrong.
- No error in the sentence: This would ignore the subject verb disagreement, so it cannot be chosen.
- Error in more than one part: Only the verb in part (c) needs correction, so this option is incorrect.

Common Pitfalls:
A frequent mistake is to make the verb plural because the nearer noun sisters is plural. This is known as attraction of proximity, where the verb wrongly agrees with the noun nearest to it instead of the true subject. Learners should train themselves to identify the real subject first, especially when phrases such as with, together with, or as well as appear in the subject. Ignoring the extra phrase and checking agreement with the main noun is a reliable strategy in competitive exam questions.

Final Answer:
Correct option: Error in part (c) only.