------
## 最终结论
```python
def max_length(lst):
    max_len = 0
    max_list = []
    for sublist in lst:
        if len(sublist) > max_len:
            max_len = len(sublist)
            max_list = sublist
    return (max_len, max_list)

# Test cases
assert max_length([[0], [1, 3], [5, 7], [9, 11], [13, 15, 17]]) == (3, [13, 15, 17])
assert max_length([[1], [5, 7], [10, 12, 14,15]]) == (4, [10, 12, 14,15])
assert max_length([[5], [15,20,25]]) == (3, [15,20,25])
```