It is difficult for the Speaker to decide which questions are planted. Sometimes, we get the impression that it may be the case. But it is difficult to determine whether or not they are.
I think there is nothing wrong with fixing a question or answer once in a while. I have even heard stories about questions having been put to the government by a member of the opposition who had notified the minister to make sure he would get an answer and an accurate one.
This happens from time to time. Does this make it a planted question? I am not sure, and it is not up to the Speaker to decide.
So, a question was asked and answered, and I believe this matter is closed.