Como
Explanation:
"Como" in that sentence is asking, "How is the new girl?" "Ella is muy simpatica" is used to describe the girl as nice in response to the question.
"Quien" would be asking, "Who is the new girl?" "Ella is muy simpatica" doesn't relate to that question.
Answer:
Explanation:
1. la puerta ⇒ las puertas
2. el mapa ⇒ los mapas
3. a estudiante ⇒ unas estudiantes
4. la pizarra ⇒ las pizarras
5. el pupitre ⇒ los pupitres
I think it is the first one but not sure
