Answer:
"No juegas" is the incorrect negative imperative form.
Step-by-step explanation:
For this question, the key is the concept of mood. Like in English, in Spanish there are three different verb moods: indicative, subjuctive and imperative. Commands (mandatos) must be expressed in the imperative mood, which is marked by verb inflections, in this particular case the verbs in the negative imperative form are "no toques" and "no salgas"
Thus, "No juegas" is the incorrect negative imperative form. The verb "juegas" is conjugated in the indicative mood. The indicative mood is used to make to make factual statements but NOT to give commands. Therefore, the verb "jugar" should have been conjugated in the imperative mood "no juegues" to indicate a request or command.
As regards the other cases "no toques" and "no salgas" both have been conjugated in the imperative form of their respective verbs "tocar" and "salir" appropriately for a negative command.