1

Problem

Neither my sister nor my brother knew the answer to the tricky question, so we had to look it up online.

2

Clue

Neither…​nor" requires matching verb tense and a full second clause after "so.

3

Hint

Check if both parts of the sentence form complete thoughts with proper subject-verb agreement and verb tense.

4

Sumup

Please summarize choices

5

Step

CHOICES

6

Choice-A

Neither my sister nor my brother knew the answer to the tricky question, so we had to look it up online. This sentence is grammatically correct with proper subject-verb agreement, verb tense, and structure. Both clauses are complete and joined correctly with a comma and "so.

Correct No change

7

Choice-B

Neither my sister nor my brother knew the answer so we are to look it up online to the tricky question, The sentence is incorrect, Tense mismatch ("knew" vs "are to"), awkward phrasing, misplaced prepositional phrase, and punctuation error make this sentence grammatically incomplete and confusing.

Wrong Neither my sister nor my brother knew the answer so we are to look it up online to the tricky question, .

8

Choice-C

Neither my sister but my brother knews the answer to tricky question, so we to look it up online. The sentence is incorrect. It uses the wrong conjunction ("but" instead of "nor"), incorrect verb form ("knews"), a missing article, and an incomplete second clause lacking proper verb structure.

Wrong Neither my sister but my brother knews the answer to tricky question, so we to look it up online.

9

Choice-D

Neither my sister nor my brother knew the answer up online to the tricky question, so we had to look it.

The sentence is incorrect because the phrase order is wrong ("knew the answer up online"), and the second clause is incomplete without "up" in "look it up." The sentence is grammatically incorrect.

Wrong Neither my sister nor my brother knew the answer up online to the tricky question, so we had to look it.

10

Step

Correct sentence - Neither my sister nor my brother knew the answer to the tricky question, so we had to look it up online.

11

Answer

Option A

12

Sumup

Please summarize choices