Ember.Select in emblemjs

I am trying to use Ember.Select in my template. Ember.Select works without any attribute | properties. But when I specify a attribute content, it gives me error as

Uncaught Error: assertion failed: an Ember.CollectionView's content must implement Ember.Array. You passed countries

My emblem template is as follows,

Ember.Select     // Works fine
Ember.Select content=countries //Gives the listed error

The code in App.IndexController is,

countries : function () {
    return ["India","US","England"]; // I have also tried passing the value in Ember.A(array_val)
}.property('')