भौतिक बनावट के आधार पर उत्तर प्रदेश को कितने मुख्य भागों में विभाजित किया जा सकता है?

With reference to the course of the Ganges river within the state of Uttar Pradesh, consider the following statements: I. The river enters the territory of Uttar Pradesh through the Bijnor district. II. The river flows out of Uttar Pradesh and enters the state of Bihar through the Ballia district.

Which of the following districts of Uttar Pradesh shares its borders with the maximum number of other Indian states, specifically bordering four different states?