What instruments were used in Eleanor Bigby?

"Eleanor Rigby," a song by The Beatles, prominently features a string quartet, which includes two violins, a viola, and a cello. This orchestral arrangement creates a poignant atmosphere that complements the song's themes of loneliness and isolation. The absence of traditional rock instruments like Guitars and drums highlights the song's unique sound and emotional depth. Additionally, Paul McCartney's vocals deliver the poignant lyrics, further enhancing the song's impact.