Predict the output of the following javascript code

const obj = { a: 'one', b: 'two', a: 'three' };
console.log(obj);

{ a: "one", b: "two" }

{ b: "two", a: "three" }

{ a: "three", b: "two" }

SyntaxError

If you have two keys with the same name, the key will be replaced. It will still be in its first position, but with the last specified value.