Generally, we use the article "an" before the word "answer", because it starts with the sound of a vowel. But "a" is also used before this word:

> 1. Above all things never show an inmate fear or your uncertainty of a situation! If you don't know **a answer** say "No" because it's easier to switch a no to a yes then a yes to a no later. And whatever you do, don't panic and stay firm on your answer. — [Matthew Zamborowski][1]

> 2. The problem is that Trump isn’t enough of a answer-avoiding politician, said [Carson][2].

My question is, is there any situation when "a" is used before the word "answer" instead of "an"?

Are the above cited uses of "a" correct?

  [1]: http://www.correctionsone.com/officer-safety/articles/203878187-16-safety-tips-from-those-who-work-behind-the-wall/
  [2]: https://www.theguardian.com/us-news/live/2016/mar/30/us-election-2016-live-clinton-sanders-trump-cruz-kasich-campaign