Yahoo Answer not in Google index

Hi forum,

One of my Yahoo questions, which was naturally ranking within 1 - 2 days of posting, is no longer indexed by Google.
There was no link building to the question apart from sharing the question itself via G+, 2 or 3 accounts.

The question, with the answer is still there, not reported to Yahoo, but not in Google.

Could anyone think of a possible reason why a specific question could be not indexed in Google?

Thanks.

Why don't you wait till Google re-crawl that question again. They have their own time interval set to perform necessary actions.