$\lim_{x \rightarrow 0} \operatorname{cosec} x \left(\sqrt{2\cos^2 x + 3\cos x} - \sqrt{\cos^2 x + \sin x + 4}\right)$ is:\\ (1) 0\\ (2) $\frac{1}{\sqrt{15}}$\\ (3) $\frac{1}{2\sqrt{5}}$\\ (4) $-\frac{1}{2\sqrt{5}}$