Required probability = (Number of ways of selecting a team with John and Peter)/(Number of ways of selecting a team of five from nine people)

Number of ways of selecting a team with John and Peter is found by selecting John and Peter first (by 2C2 ways) AND (so multiplication) then selecting the remaining 3 players required in the team from the remaining 7 people available(by 7C3 ways). So the total number of such ways is 2C2*7C3

Number of ways of selecting a team of 5 from 9 is 9C5.

Required probability
= (2C2*7C3)/(9C5)
= (1*7*5)/(9*2*7)
= 5/18

[spoiler](D)[/spoiler] is the answer