Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Articulatory class | Non- stop | Plain stop | Aspirated stop | "Muddy" voice |
| --- | --- | --- | --- | --- |
| 牙音 "molar sounds" | (ㆁ) | ㄱ | ㅋ | ㄲ |
| 舌音 "tongue sounds" | ㄴ | ㄷ | ㅌ | ㄸ |
| 脣音 "lip sounds" | ㅁ | ㅂ | ㅍ | ㅃ |
| 齒音 "incisor sounds" | ㅅ | ㅈ | ㅊ | ㅉ, ㅆ |
| 喉音 "throat sounds" | ㅇ | ㆆ | ㅎ | ᅇ, ㆅ |
| 輕脣音 "light lip sounds" | ㅱ | ㅸ | ㆄ | ㅹ |
Question:
If the Non- stop is (ㆁ), what is the Articulatory Class?
Answer:
牙音 "molar sounds"