Question

“Where
is the bus stop? The old man asked a policeman.

 a. The old man asked where was the bus stop.

      
b. The old man asked where the bus stop was.

             c. The old man told a policeman
where the bus stop is.

             d. The old man asked where  the bus stop has been.

Answer 1

The old man told a policeman
where the bus stop is. Вариант с.