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Respuesta:
C.
1Las variables declaradas con
lettienen scope de bloque, por ende la variableatiene su propio scope que es diferente al de la variableby por este motivo no existe conflicto con sus nombres.En otras palabras, la variable
a = 2esta asilada en su bloque, mientras que la variablea = 1esta en el mismo scope que elconsole.log(a), esto explica por que mostramos por consola1.