Which is the lowest instrument in string section of orchestra?

The lowest instrument in the string section of an orchestra is the double bass. It is also known as the bass viol or simply the bass. The double bass is a large, bowed string instrument that produces low pitches. It is typically played by sitting down, with the instrument resting between the player's legs. The double bass is an important member of the orchestra, and it is used in a wide variety of musical styles, from classical to jazz to rock.