A. Muhammad Jahangir
B. O.P. Ralhan
C. Khushwant Singh
D. Stanley Wolpert
🧠 Explanation:
O.P. Ralhan authored Documents on Punjab, compiling Punjab’s historical records. Studying this highlights regional history, a key topic in historiography. It underscores the importance of archival work, with implications for understanding Punjab’s socio-political evolution and its role in South Asian historical studies.