A concerto is a large-scale work in several movements for an instrumental soloist and orchestra.
An orchestra exists as a large instrumental ensemble standard of classical music, which incorporates instruments from various families, including bowed string instruments such as the violin, viola, cello..
A concerto is, from the late Baroque era, mostly understood as an instrumental composition, written for one or more soloists accompanied by an orchestra or other ensemble. It is a classical music composition that highlights a solo instrument against the background of a full orchestra. The typical three-movement structure, a slow movement preceded and followed by fast movements, became a standard from the early 18th century.
Therefore, (B) option is the correct answer.
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