Possible Duplicate:
What is a good way to comment if-else-clauses?

What is the best way to write comments for if-else statement? There is possible ways:

A.

//first comment
if (condition) {
    ...
}
//second comment
else { 
    ...
}

B.

if (condition) { //first comment
    ...
}
else { //second comment
    ...
}

C.

if (condition) { 
    //first comment
    ...
}
else { 
    //second comment
    ...
}

Which one is the best, or there is some better possibilities?