A sentence has been given in Active/Passive voice. Out of the four alternatives suggested below, select the one which best expresses the same sentence in Passive/Active voice. 
 

The pilot landed the aircraft safely

The aircraft was landed safely by the pilot.

The pilot landed the aircraft safely.

Explanation:

• The aircraft had been landed safely by the pilot.: This passive construction changes the tense from simple past ("landed") to past perfect ("had been landed"), which may alter the original meaning.
• The aircraft was landed safely by the pilot.: This passive construction correctly maintains the original meaning and reverses the subject and object while using the appropriate verb tense.
• The aircraft has been landed safely by the pilot.: This passive construction changes the tense from simple past ("landed") to present perfect ("has been landed"), which may alter the original meaning.
• The aircraft was to be landed safely by the pilot.: This passive construction introduces "was to be" and changes the tense, which doesn't accurately convey the original sentence.