Which one of the given options is correct about the given sentence ?
"Either she or they have to attend the meeting."

The correct answer is Option A (Right).

Key Points:
• Rule of Proximity in Subject-Verb Agreement with alternative conjunctions (either...or / neither...nor).
• When subjects differing in number or person are connected by 'either...or', the verb agrees with the subject nearest to it (Rule of Proximity).
• In the sentence 'Either she or they have to attend the meeting', the subject closest to the verb is the plural pronoun 'they'.
• The verb 'have' correctly agrees in plural number with 'they'.
• Thus, the sentence is perfectly Right.
• Key Takeaway: With 'either...or', the verb agrees with the closer subject; 'they' correctly takes 'have'.