In the question below four words are given in bold. These four words are may not be in their correct position. The sentence is then followed by options with the correct combination of words that should interchange with each other in order to make the sentence grammatically and contextually correct. Find the correct combination of the words that replace each other.

Many mechanical constructed (A) to calculation and measurement (B) were aids (C) for navigation (D) use.

Correct option is A

We need to interchange (A)-(C) to make sentence contextually meaningful. Therefore, the correct sentence will be, “Many mechanical aids to calculation and measurement were constructed for and navigation use”