The correct answer is - Of its mountain ranges, the Urals are the highest.
This is the statement that is not accurate, the Urals are not the highest mountain range in Russia, there's multiple mountains that are much higher than the Urals. In fact, the Urals are not even a mountain range that falls into the category of high mountain, but in a medium height mountain range.
Even though the height is not recognizable for the Urals, their trademark is their length, they are the longest mountain range in Russia.
