Which of the following is the correct way of applying the custom attribute called Tested which receives two-arguments - name of the tester and the testgrade?

1. Custom attribute cannot be applied to an assembly.
2. [assembly: Tested("Sachin", testgrade.Good)]
3. [Tested("Virat", testgrade.Excellent)]
   class customer { /* .... */ }
4. Custom attribute cannot be applied to a method.
5. Custom attribute cannot be applied to a class.

1. Method
2. Class
3. Assembly
4. Namespace
5. Enum

Stack st = new Stack();
st.Push(11);
st.Push(22);
st.Push(-53);
st.Push(33);
st.Push(66);

IEnumerable e;
e = st.GetEnumerator(); 
while (e.MoveNext())
Console.WriteLine(e.Current);

IEnumerator e;
e = st.GetEnumerable(); 
while (e.MoveNext())
Console.WriteLine(e.Current);

IEnumerator e;
e = st.GetEnumerator(); 
while (e.MoveNext()) 
Console.WriteLine(e.Current);

IEnumerator e;
e = Stack.GetEnumerator(); 
while (e.MoveNext()) 
Console.WriteLine(e.Current);

[WebService (Name = "CuriousTab", Description = "CURIOUSTAB WebService")] 
class AuthenticationService: WebService
{ /* .... */}

<WebService ( Name : "CuriousTab", Description : "CURIOUSTAB WebService" )> 
class AuthenticationService: inherits WebService
{ /* .... */}

<WebService ( Name = "CuriousTab", Description = "CURIOUSTAB WebService" )> 
class AuthenticationService: extends WebService
{ /* .... */}

[WebService ( Name := "CuriousTab", Description := "CURIOUSTAB WebService")] 
class AuthenticationService: inherits WebService
{ /* .... */}

1. On compiling a C#.NET program the attibutes applied are recorded in the metadata of the assembly.
2. On compilation all the attribute's tags are deleted from the program.
3. It is not possible to create custom attributes..
4. The attributes applied can be read from an assembly using Reflection class.
5. An attribute can have parameters.