A class contains 4 boys and `g` girls. Every Sunday five students, including at least three boys go for a picnic to Appu Ghar, a different group being set every week. During, the picnic, the class teacher gives a doll to each girl in the group. If the total number of dolls distributed was 85, then value of `g` is 15 (b) 12 (c) 8 (d) 5