Which of the following pairs match similarly to the pair of words "Vacuum: Air"?

Which of the following pairs match similarly to the pair of words "Vacuum: Air"?

مندرجہ ذیل میں سے کون سا جوڑا الفاظ کے جوڑے "ویکیوم: ایئر" سے ملتا جلتا ہے؟
Explanation

Just as a vacuum is the absence of air, a vacancy is the absence of something occupied.