Mệnh đề nào sau đây đúng?

“\(\exists x \in \mathbb{R},\,\,x - 3 = {x^2}\)”.

“\(\forall x \in \mathbb{R},\,\,x + 1 > x\)”.

“\(\forall x \in \mathbb{R},\,\,\left| x \right| = x\)”.

“\(\exists x \in \mathbb{R},\,\,{x^2} < 0\)”.