Final answer:
Mozart's famous Symphony No. 40 in G minor is one of his later compositions and a well-regarded work of the Classical era. The correct answer is a. 40.
Step-by-step explanation:
One of Mozart’s most famous symphonies is Symphony No. 40 in G minor. This iconic work, composed in 1788, is known for its emotionally charged melodies and is one of the last symphonies Mozart wrote before his death. The correct answer to the provided question is a. 40. Symphony No. 40 stands out as one of the most admired symphonic works of the Classical era and remains a staple in the repertoire of orchestras worldwide. The piece is also known as the 'Great G minor Symphony', distinguishing it from the earlier, lesser-known 'Little G minor Symphony', which is numbered Symphony No. 25.