$\begin{array}{l}\text{Here,}\\ \text{[(5}\sqrt{\text{7}}\text{+}\sqrt{\text{7}}\text{)}\times \text{(4}\sqrt{\text{7}}\text{+8}\sqrt{\text{7}}\text{)}-{\text{(19)}}^{\text{2}}\text{= ?}\\ \\ \Rightarrow \text{ [20}\times \text{7 + 280 + 28 + 56]}-\text{361 =?}\\ \\ \Rightarrow \text{ [420 + 84]}-\text{361 =?}\\ \\ \Rightarrow \text{ 504}-\text{361 = ?}\\ \\ \text{? = 143}\end{array}$

Hence Option A is correct.