Four of the following forms a group based on certain pattern. Who does not belong to this group?

Study the following information carefully to answer the given question: Eight friends – P, Q, R, S, W, X, Y and Z were born on in January, April, November and December on either 5th or 12th (No two people born on same on dates). The ones who were born in a month having 30 days like different colour – Pink, Red, Yellow and Blue not necessarily in the same order. The ones who were born in a month having 31 days like different flower – Lily, Rose, Lotus and Sunflower not necessarily in the same order. W was born on 12th of the month which has 30days. Two people were born between W and S. S does not like any colour. Q likes Pink. Number of people was born after P as before S are same. One person was born between the ones who like Red and Lotus flower. Two people were born between W and one who likes Sunflower flower. No person was born between Q and one who likes Lily flower. P does not like Lily flower. The ones who like Rose flower and Lily were born on same month. Two people were born between P and Z. X do not like any Flower. One person was born between R and one who likes Pink. Number of persons was born between the ones who like Blue and Lotus flower is two.