Correct Answer:
A. KPK
The correct answer is KPK. The Kabul River is a significant transboundary river that flows through eastern Afghanistan and then enters Pakistan, primarily flowing through the province of Khyber Pakhtunkhwa (KPK). It is a major tributary of the Indus River.
- Balochistan: Balochistan is located in the southwest of Pakistan, and the Kabul River does not flow through this province.
- Sindh: Sindh is in the southeast of Pakistan, and while it is home to the Indus River, the Kabul River does not directly flow through Sindh.
- None of these: This is incorrect as the Kabul River is prominently located in KPK.
Geographical knowledge of Pakistan's provinces and major rivers is essential for this question.