Which of the following modes of communications are available when using Inmarsat-C?

Correct Answer: Option A — TELEX and e-mail

Inmarsat-C is strictly a data-only system. It facilitates the transmission of TELEX and e-mail messages via store-and-forward protocols. It lacks the bandwidth and real-time processing capabilities required for voice, fax, or high-speed data transmission, which are reserved for other Inmarsat services like Inmarsat-B or FleetBroadband.