Which file format should you only compress using lossless compression?

Which file format should you only compress using lossless compression?

• .MP4
• .TXT
• .MP3
• .JPEG 

 EXPLANATION

.TXT can only use  lossless compression, .JPEG, MP3 and MP4 are examples of media files which can be compressed with either lossy or lossless compression, but best compressed with higher compression given by lossy compression algorithms.
Compression algorithms are either lossy or lossless.
Lossy compression can compress a file more by modifying the original information into a more compression friendly version.  Thus lossy compression produces a similar file to the source file when uncompressed, but not the same, while lossless compression produces the same file as the source file when uncompressed.
Due to it's higher compression Lossy compression is typically used to compress multimedia data such as audio, video, and images. https://en.wikipedia.org/wiki/Lossy_compressio

Lossless compression is required for files that need to retain original data integrity when uncompressed, such as documents, spreadsheets, databases and text .TXT.
https://en.wikipedia.org/wiki/Lossless_compression

SOURCE

https://en.wikipedia.org/wiki/Lossless_compression