Which of the following is an example of a transmission medium?

Which of the following is an example of a transmission medium?

مندرجہ ذیل میں سے کون سا ٹرانسمیشن میڈیم کی مثال ہے؟
Explanation

A transmission medium is a channel through which data is transmitted — satellite systems are used to transmit signals over long distances.

LED TV or video camera are devices, not mediums for data transmission.