Rupa and Saroj want to attend a seminar together between $9 \, am$ and $5 \, pm$ on Friday. Saroj cannot leave till after her lunch break which begins at $1:30 \, pm$. Rupa is free after her meeting which begins at noon. For how many hours can the two of them attend the seminar?
- A$3 \frac{1}{2}$ hours
- B$2 \frac{1}{2}$ hours
- C$4 \frac{1}{2}$ hours
- DCannot be determined
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