Which of the following statements is correct about Bitwise | operator used in C#.NET?

Console.WriteLine(13 / 2 + " " + 13 % 2); 

1. The conditional operator (?:) returns one of two values depending on the value of a Boolean expression.
2. The as operator in C#.NET is used to perform conversions between compatible reference types.
3. The &* operator is also used to declare pointer types and to dereference pointers.
4. The -> operator combines pointer dereferencing and member access.
5. In addition to being used to specify the order of operations in an expression, brackets [ ] are used to specify casts or type conversions.

int a = 10, b = 20, c = 30; 
int res = a < b? a < c? c : a : b; 
Console.WriteLine(res);

int i, j = 1, k;
for (i = 0; i < 5; i++)
{
    k = j++ + ++j;
    Console.Write(k + " ");
}

1. >=
2. !=
3. Not
4. <=
5. <>=

int num = 1, z = 5;

if (!(num <= 0))
    Console.WriteLine( ++num + z++ + " " + ++z ); 
else
    Console.WriteLine( --num + z-- + " " + --z );