If the sender uses a word in a technical sense but the receiver understands its ordinary meaning then what barrier is this?

Correct answer: Semantic barrier

The governing concept is a semantic barrier, which occurs when the sender and receiver attach different meanings to the same word or expression. Here, the sender intends a specialised technical meaning, but the receiver applies the everyday meaning, so the message is interpreted differently. Option C is correct. A physical, device, or time barrier concerns the environment, equipment, or timing rather than word meaning.