“Pongan” is the correct answer because it is the plural form of the word “pon”. The reason it is plural is because at first, the sentence said “los chicos” which is translated into English as, “the kids” or, “the boys.” Which is also in plural form.
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Many people have different ways of when introducing their selves when asked this. "Mi nombre es Roberto" (My name is Robert) is a proper and professional way when introducing their self. Therefore, that would be answer. "Soy Roberto" (I'm Robert) is an another way of asked this question. It is literally just "I am Robert", (Yo soy Roberto).