The correct option is B 1
Simplifying the first number by solving the bracket first, we have,
58 ÷ [45 - 38]
= 58 ÷ [32−1540]
= 58 ÷ [1740]
Using the division rule and flipping the second fraction, we have,
= 58 × [4017]
= 2517
Since both the fractions are reciprocal of each other, the product of the fractions 2517 × 1725 = 1.