Sequences And Arrays: Change type of res0: from List to Seq

[Samehadar]

If you try to compile with List[String] you receive type mismatch error:
"Error:() type mismatch;
found : Seq[String]
required: List[String]
val r: List[String] = s map {"

[manufacturist]

Shouldn't both answers be accepted, even though r is of type Seq[String]?

val s = Seq("hello", "world")
val r = s map {
  _.reverse
}

r.isInstanceOf[Seq[String]]
//true

r == Seq("olleh", "dlrow")
//true

r.isInstanceOf[List[String]]
//true

r == List("olleh", "dlrow")
//true

I mean, the List type does extend AbstractSeq:

abstract class AbstractSeq[+A] extends AbstractIterable[A] with Seq[A]

EDIT:
Actually anything that extends the AbstractSeq should be accepted, right?

[raulraja]

@Samehadar thanks for your contribution