Q34

A TCP sender successfully establishes a connection with a TCP receiver and starts the transmission of segments. The TCP congestion control mechanism's slow-start threshold is set to $10000$ segments. Assume that the round-trip time is fixed at $1$ millisecond. Assume that the sender always has data to send, the segments are numbered from $1$, and no segment is lost. Let $t$ denote the time (in milliseconds) at which the transmission of segment number $2000$ starts. Which one of the following options is correct?