if the universal set µ = {x : x is a natural number and 1 < x < 9}, p ={x :1 < x < 4} and Q = {1, 2, 3, 4, 5, 7}. Find (P ∨ Q)

• A.{1, 2, 3, 4, 5, 6, 7, 8, 9}
• B.{1, 2, 3, 4, 7}
• C.{1, 2, 3, 4}
• D.{6, 8, 9}