In what year did Halley's Comet, which will not appear again until the year 2061, previously approach Earth?

The story behind the answer

1986 is correct because Halley’s Comet has a roughly 75–76 year orbital period. Its last close approach (perihelion) was in 1986, making the next one due in 2061. The other years don’t fit this cycle (for reference, a notable earlier appearance was in 1910).

Named after Edmond Halley, who in 1705 predicted the comet’s periodic returns, Halley’s is the