CHANDRAJYOTI SINGH | IAS RANK 28 | CSE 2019 | Do's & Don't for History Optional
10:35
DARPAN AHLUWALIA IAS | RANK 80 | CSE 2019 | FROM DOCTOR TO IAS : MEDICAL SCIENCE AS OPTIONAL
14:57
History Optional Preparation Strategy by Vikram Grewal, IAS Rank 51 CSE 2018
35:10
Chandrajyoti Singh (Rank - 28, UPSC CSE -2019)
31:55
Bhavesh Sharma 502 Rank, 286 Marks in History Optional: Preparation Strategy
41:53
HISTORY ANSWER WRITING | FOR IAS MAINS 2018 : by Aparajita IAS Rank 40, CSE 2017 and Piyush Kumar
9:11
Highest Score in History Optional 316 Marks, History Preparation Strategy by Ishwar Kumar Rank 187
2:10:58
History Optional Strategy for UPSC CSE 2025 | Vajiram & Ravi
20:43