As was answered, it is 머네요. A verb whose stem ends with ㄹ 받침(bottom consonant), ㄹ is dropped if the next syllable starts with ㄴ.
Other examples:
- 길다 (long) -> 기네. 기니? (is it long?).
- 밀다 (push) -> 미네, 미니? 미는 사람 (a person pushing).
- 물다 (bite) -> 무네, 무니? 무는 개.