The typeof function returns a string that represents the data type of the given variable. The correct possible results for typeof in many programming languages are typically 'number', 'string', and 'boolean' (or 'bool'). 'Null' is generally not a direct return type from the typeof function, and 'True, False, Unknown' are not type descriptors. Therefore, the most accurate possible results from the options provided are 'Number, String, Bool'.