When the examination were over, ..….went to paris.

The correct option to complete the sentence is Rohan and I.

Step-by-step Explanation:

1. Identify the grammatical role required:
In the given sentence, "When the examination were over, ..….went to paris.", the missing phrase acts as the subject of the verb "went".

2. Determine the correct pronoun (Subject vs. Object pronoun):
- "I" is a subject pronoun (used when the person is performing the action).
- "Me" is an object pronoun (used when the person is receiving the action).
Since the pronoun is part of the subject performing the action ("went to Paris"), we must use "I", not "me".

3. Apply the rule of courtesy/order of pronouns:
In English grammar etiquette, when referring to another person and oneself, it is standard to mention the other person first out of politeness. Therefore, "Rohan and I" is preferred over "I and Rohan".

Combining both rules, the grammatically correct and polite phrase to complete the sentence is "Rohan and I".

Complete Sentence:
"When the examination were over, Rohan and I went to Paris."