Odd -- the accepted translations for this are pemej! and yImej!, and both are marked as "best" translations.
So it's not surprising that they would both appear in a three-option multiple-choice exercise but I would expect the system to require the learner to mark both of them.
If this happens again, could you post a link to a screenshot, please?
(As for the recapitalisation the system does to our sentences in multiple-choice exercises, that's beyond our control, unfortunately -- but it's a known issue that's being worked on.)
I just ran into the same question and had the same problem. Screenshot: https://strikeslipvault.org/owncloud/index.php/s/8njqFyxcGRPMaFA
Thank you so much for getting a screencap of it. I have confirmed that the sentences is properly set up to accept either answer, so something has gone wrong in the software. Please also send a report to https://support.duolingo.com/hc/en-us/articles/204728264-How-do-I-report-a-bug-