Which of the following statements is correct about an enum used in C#.NET?

1. An enum can be declared inside a class.
2. An enum can take Single, Double or Decimal values.
3. An enum can be declared outside a class.
4. An enum can be declared inside/outside a namespace.
5. An object can be assigned to an enum variable.

enum color : int
{
    red = -3,
    green,
    blue 
}
Console.Write( (int) color.red + ", "); 
Console.Write( (int) color.green + ", "); 
Console.Write( (int) color.blue );

1. To use the keyword enum, we should either use [enum] or System.Enum.
2. enum is a keyword.
3. Enum is class declared in System.Type namespace.
4. Enum is a class declared in the current project's root namespace.
5. Enum is a class declared in System namespace.

enum color: int
{ 
    red,
    green, 
    blue = 5, 
    cyan,
    magenta = 10, 
    yellow 
}
Console.Write( (int) color.green + ", " ); 
Console.Write( (int) color.yellow );

enum color
{
    red,
    green,
    blue 
}
color c = color.red;
Type t;
t = c.GetType();
string[ ]str;
str = Enum.GetNames(t);
Console.WriteLine(str[ 0 ]);

1. Every enum is derived from an Object class.
2. Every enum is a value type.
3. There does not exist a way to print an element of an enum as a string.
4. Every enum is a reference type.
5. The default underlying datatype of an enum is int.

1. By default the first enumerator has the value equal to the number of elements present in the list.
2. The value of each successive enumerator is decreased by 1.
3. An enumerator contains white space in its name.
4. A variable cannot be assigned to an enum element.
5. Values of enum elements cannot be populated from a database.