How many matches will be played in the knockout tournaments first round if there are 15 teams?

Class 12th Physcal Education, Question -How many matches will be played in the knockout tournaments first round if there are 15 teams?

These are the options for the question :How many matches will be played in the knockout tournaments first round if there are 15 teams?

a) 8
b) 7
c) 5
d) 6

The correct answer is -b) 7