( 999 9991000 × 7 ) is equal to = ?

Answer: Option C

$$\begin{array}{rl}& \text{Given expression ,}\\ & \left(1000-\frac{1}{1000}\right)\times 7\\ & =\left(7000-\frac{7}{1000}\right)\\ & =6999\frac{993}{1000}\end{array}$$