The correct answer is: B. was meeting / told
The past continuous tense is used to describe an action that was in progress at a specific time in the past. In this case, the specific time in the past is “yesterday.” The past simple tense is used to describe an action that happened at a specific time in the past and is now complete. In this case, the action is “she told me about you.”
The sentence “Yesterday when I was meeting her she told me about you” means that I was in the middle of meeting her when she told me about you. The action of meeting was in progress at the time of the action of telling.
The other options are incorrect because they do not use the past continuous tense. Option A, “have met / told,” uses the present perfect tense, which is used to describe an action that has happened at some point in the past and continues to the present. Option C, “have met / would tell,” uses the past perfect tense, which is used to describe an action that happened before another action in the past. Option D, “have met / tell,” uses the simple present tense, which is used to describe an action that happens regularly or repeatedly.