Out of four different structures of a sentence, only one is supposed to be correct.
To reflect the preparedness of our armed forces to respond to any threat to its national security, a comprehensive joint exercise was carried out by Arabian Army and Air Force.
The Arabian Army and Air Force carried a comprehensive joint exercise, to reflect the preparedness of our armed forces to respond to any threat to its national security.
A comprehensive joint exercise was carried out by Arabian Army and Air Force to reflect on the preparedness of our armed forces to respond to any threats to its national security.
A comprehensive joint exercise was carried out by Arabian Army and Air Force to reflect the preparedness of our armed forces to respond to any threats to its national security.
Now, in structure 3. on is the mistake. In structure 2. it should have been carried out and not carried.
Then, what I understand, 1 and 4 are the exact same sentence having only the clauses interchange positions. So both should be correct grammatically.Am I wrong?