Fill in the blank (_) in the following sentence from the following choices.
Sentence: Rabbits are cute but Nelson was allergic but not Brian, so _ had to stay far away.

Choice 1: Rabbits are cute but Nelson was allergic but not Brian, so Nelson had to stay far away.
Choice 2: Rabbits are cute but Nelson was allergic but not Brian, so Brian had to stay far away.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
1.