Q:

Choices for flagging question are not available

I wanted to flag a question and I had only 3 choices:

it needs ♦ moderator attention  
it is spam  
it is not welcome in our community 

Before today, I could chose

not a real question
off topic
...

Why the original choices are not available ? 
I wanted to flag this question : https://stackoverflow.com/questions/10826861/i-have-a-function-written-in-php-i-want-to-convert-that-in-to-java-can-some-one

A:

The "it does not belong here" category of flags consists of flags for closure; that is, flags that alert moderators (and 10k-rep users) to questions that need to be closed for whichever reason that is chosen.  The options in that category (and in fact the entire close flagging UI) are identical to the close reasons you will have access to when you reach 3k reputation. 
Since the question you link to has already been closed since you first accessed the flags dialog, there is no reason to let users flag it for closure anymore, so the system simply hides that flag category, leaving you with the other choices.