Each of the followed paired numbers have a relationship that's the same for

Q India is currently developing BMD which is a two tier defense system to shoot down the enemy missiles. What is BMD here?
Q Would you like to change your domain, if yes why?
Q The 1849 Gold-Rush was due to gold discovered at
Q Can we have empty XML tags?
Q How To Quote Element Attribute Values Properly?
Q Which is the oldest Veda?
Q As Corpus Christi captain in the University Challenge quiz show who made the news for her remarkable points-scoring?
Q What type of connectivity does the readpipe/makepipe utility test?
Q Which property of a table specifies the width that should appear between table cells?
Q Peanuts is the work of which cartoonist?
Q Explain the term 'design for manufacture' giving examples.