Use Of The A And An Questions Medium
The rule for using "A" or "An" before words starting with a silent "k" is to use "An." This is because the choice between "A" and "An" is determined by the sound that follows the article, not the actual letter. Since the "k" in these words is silent and does not produce a sound, the following word begins with a vowel sound. Therefore, "An" is used before words starting with a silent "k."