Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Round | Date | Opponent | Venue | Result | Attendance |
| --- | --- | --- | --- | --- | --- |
| R2 1st Leg | 19 September 2000 | Oldham Athletic | A | 3-1 | 3213.0 |
| R2 2nd Leg | 27 September 2000 | Oldham Athletic | H | 5-1 | 4773.0 |
| R3 | 1 November 2000 | Sheffield United | H | 2-1 | 32283.0 |
| R4 | 29 November 2000 | West Ham United | A | 2-1 | 20853.0 |
| QF | 12 December 2000 | Birmingham City | A | 0-2 | 22911.0 |
Question:
What round has 2-1 as the result, and A as the venue?
Answer:
R4