CSV Format Instructions:
Required Columns (1-9):
Roll, Name, Mobile No 1, Mobile No 2, Exam Name, Marks, Neg, Highest, Position
Optional Column (10):
Date (YYYY-MM-DD format, like: 2025-09-23)
Example CSV content:
Roll,Name,Mobile No 1,Mobile No 2,Exam Name,Marks,Neg,Highest,Position,Date
185678,"Rashid Ahmed","01712345678","01812345679","Bio Challenge 2025",45.50,1.25,50.00,10,2025-09-23
180423,"Fatema Khatun","01698765432","","Physics Test",38.75,2.00,45.25,15,2025-09-22
179456,"Mohammad Rahman","01555123456","01777654321","Chemistry Quiz",42.25,1.75,48.50,8,2025-09-21
Important:
- Mobile numbers: Format as TEXT in Excel or wrap in quotes "01712345678"
- Names with commas: Wrap in quotes "Rashid, Ahmed"
- Date is optional - leave empty if not available
- Keep header row as first line
- Save as CSV (Comma Separated Values) format