Let $(X,\mathscr{M})$ be a measure space and let $u,v:X\to \mathbb{R}$ be two measurable functions where $\mathbb{R}$ is equipped with the Standard topology. Suppose that $(Y,\mathscr{T})$ is a Topological Space and $\Phi:\mathbb{R}^2\to Y$ is Continuous (here $\mathbb{R}^{2}$ is also equipped with standard topology) then $h:X\to Y$ defined as $$h(x)=\Phi(u(x),v(x))$$ is measurable.