Study the following Information to answer the given questions: In a certain code ‘a friend of mine’ is written as ‘4 9 1 6’, ‘mine lots of metal’ is written as ‘3 1 0 9’ and ‘a piece of metal’ is written as ‘7 1 6 3'. What does '9' stand for ?
1)of
2)mine
3)friend
4)lots
5)metal

Explanation

2