Find out which part of a sentence has an error.

Correct option is B

Option (b) contains an error.
The verb "were" is incorrect. It should be "was" because when a singular subject is followed by along with, together with, or as well as, the verb agrees with the main subject, not the phrase that follows. Here, The director is singular, so the verb must be singular ( was).
Grammatical rule used: This is a case of Subject-Verb Agreement. When a singular noun is followed by phrases like along with, as well as, or together with, the verb must agree with the main subject, not the additional phrase.
For example:
· The teacher, along with her students, was happy.
Example:
· The director, along with all his officers, was welcomed with due respect.
Explanation of the grammatical rule in Hindi: यह Subject-Verb Agreement का मामला है। जब कोई singular subject (जैसे The director) के साथ along with, as well as, या together with जैसे शब्द जुड़े होते हैं, तो क्रिया (verb) मुख्य विषय (subject) के अनुसार ही होती है, न कि बाद में आने वाले शब्दों के अनुसार।
उदाहरण के लिए:
· The teacher, along with her students, was happy.
· यहाँ teacher singular है, इसलिए was का प्रयोग हुआ है।