Question: Where is the ancient border between Lancashire and Yorkshire located?

Is "The area served by the Lord-Lieutenant (termed now a ceremonial county) covered the entirety of the administrative county and the county boroughs, and was expanded whenever boroughs annexed areas in neighbouring counties such as Wythenshawe in Manchester south of the River Mersey and historically in Cheshire, and southern Warrington." the correct answer?
Pick from:
+ yes.
+ no.
no