Statement I: The number of solutions of the equation $\left|\sin x\right|=\left|x\right|$ is only one.
Statement II: $\left|\sin x\right|\ge 0\forall x\in R.$ 

Statement I is true, Statement II is true, Statement II is not a correct explanation for Statement II

Statement I is true, Statement II is false

Statement I is false, Statement II is true

Statement I is true, Statement II is true; Statement II is a correct explanation for Statement I.