Correct Answer:
C. KPK
The correct answer is KPK. The Federally Administered Tribal Areas (FATA) were merged into the province of Khyber Pakhtunkhwa (KPK) through the 25th Constitutional Amendment in May 2018. This historic merger aimed to bring FATA into the mainstream political and administrative system of Pakistan, extending provincial laws and governance structures to the region. Options A (Punjab), B (Sindh), and D (Balochistan) are incorrect as FATA's merger was specifically with KPK, not any other province.