class Subject(name: String)

subjects is a sequence of Option[Subject]

val subjects = Seq(Subject("Physics"),Subject("Maths"),None)

We have a function which returns a Option[Subject]
val target = getTarget() //Option[Subject]

What is the idiomatic safe way of finding a Option[Type] in a sequence of Option[Type] – used-cases being

1. subjects may be empty
2. subjects may contain all none
3. target may be None