Who is the composer of the String Quartet in C Minor?

The composer of the String Quartet in C Minor is Ludwig van Beethoven. This specific quartet is part of Beethoven's early works, and it showcases his unique style, which was developing during his transition from the Classical to the Romantic period in music. Beethoven's quartets are particularly known for their emotional depth and structural innovation, distinguishing them from the quartets of his predecessors.

While Haydn and Mozart were significant composers of string quartets, the specific work referred to in the question, the String Quartet in C Minor, is not attributed to them. Haydn, often called the father of the string quartet, developed the form significantly but did not compose this particular quartet. Mozart also made substantial contributions to the string quartet repertoire, yet he is not the composer of this specific piece. The choice of Beethoven is notable because this piece is a vivid example of how he pushed the boundaries of traditional forms and expressions in chamber music.