From the lesson, we saw that our number gets closer to 1 (which means larger) as we do so, so the largest of these choices is ⁴⁹/₉.
There's no fraction that is ⁴⁹/₉ in the question. The corrected version:
From the lesson, we saw that our number gets closer to 1 (which means larger) as we do so, so the largest of these choices is 5 ⁴/₉.