For the given four differentiable functions $\left(p,q,r,s\right)$ of $y,$ what is the derivative of their product $pqrs$?

$pqr{s}^{\prime }+pq{r}^{\prime }s+p{q}^{\prime }rs+p^{\prime }{q}^{\prime }rs$

$pqr{s}^{\prime }+pq{r}^{\prime }s+p{q}^{\prime }rs+p^{\prime }qrs$

$pqr{s}^{\prime }+pq{r}^{\prime }s+p{q}^{\prime }{r}^{\prime }s+p^{\prime }qrs$

$p{q}^{\prime }r{s}^{\prime }+pq{r}^{\prime }s+p{q}^{\prime }rs+p^{\prime }qrs$