Is my sentence correct?

Thanks much for your answer. Should I not use an before approval?

Since approval is specific, that is, there cannot be more than one approval by the same person.

And also this:

Chandrasekhar ReddyThanks much for your answer

Thank you for your answer or Thanks for your answer.

Hi Suresh,
Thanks for your answer. Still I am confused. Would you please tell me where should I use an and where I should not.

An approval.
Get an approval.
Get the approval.

Which are correct?

I see nothing wrong with an approval in your sentence.

CB

Hi Chandrasekhar

Since CB has said that an approval is possible in your sentence, I must take it as a lesson.

But the point I was trying to make was I was looking at approval as "consent" given by a person to carry out a task etc.

In this context I couldn't see it as "an approval".

Could you please tell me the scenarios where an is not countable?

I have learnt that we use a and an are used before countable nouns, but I'm not sure if they can be used before uncountable nouns.

I think native speakers will be able to give us a clear answer.

Could you please give me few countable and non countable nouns example?