[Answer] Which U.S. state was created as a result of the Civil War?

Step 1 : Introduction to the question "Which U.S. state was created as a result of the Civil War?"

...West Virginia was created during the American Civil War when the northwestern counties of Virginia opposed their state’s decision to secede from the Union in 1861. Delegates from these Union-loyal counties organized a separate government and sought admission to the United States as a new state. After approval by Congress and President Abraham Lincoln, West Virginia officially became the 35th state on June 20, 1863. It remains the only U.S. state created directly as a result of the Civil War, formed from a divided Virginia.

[Answer] What Beatles song featured Eric Clapton on lead guitar?

Step 1 : Introduction to the question "What Beatles song featured Eric Clapton on lead guitar?"

...Eric Clapton played the lead guitar solo on “While My Guitar Gently Weeps,” a song written by George Harrison and released on the Beatles’ 1968 self-titled album, commonly known as The White Album. At the time, tensions within the band were high during the recording sessions, and Harrison invited his friend Clapton to the studio to contribute. Although guest musicians were rare on Beatles tracks, Clapton’s expressive guitar solo became one of the most memorable moments on the album and one of the most famous collaborations in rock history.

[Answer] Which man was born on the same exact day as Abraham Lincoln?

Step 1 : Introduction to the question "Which man was born on the same exact day as Abraham Lincoln?"

...How's this for a coincidence? Abraham Lincoln and Charles Darwin were born on the same day, February 12, 1809. Lincoln and Darwin share similarities beyond their birthday and epic beards. Both lost their mothers at a young age: Darwin at 8 and Lincoln at 9. One was born in a log cabin in Kentucky to poor parents, the other in a country estate to a wealthy British family. The two never met. But they both changed the most basic ways that people viewed human existence and helped bring about a new era in the history of human thought.

[Answer] The Mason–Dixon Line forms the northern border of which U.S. state?

Step 1 : Introduction to the question "The Mason–Dixon Line forms the northern border of which U.S. state?"

...The Mason–Dixon Line marks the northern boundary of Maryland and the southern boundary of Pennsylvania. Surveyed between 1763 and 1767 by English astronomers and surveyors Charles Mason and Jeremiah Dixon, the line was established to resolve a long-running colonial boundary dispute between the Penn and Calvert families. In later years, it gained broader cultural significance as a symbolic dividing line between the Northern and Southern United States, particularly in the decades leading up to the American Civil War.

[Answer] Which author is widely recognized as the bestselling novelist of all time?

Step 1 : Introduction to the question "Which author is widely recognized as the bestselling novelist of all time?"

...Agatha Christie is widely regarded as the bestselling novelist of all time, with an estimated two billion copies of her books sold around the globe, according to Guinness World Records. Known as the “Queen of Mystery,” Christie wrote 66 detective novels and 14 short-story collections, including famous works like Murder on the Orient Express and The Murder of Roger Ackroyd. Her extraordinary sales rival those of the Bible and the works of William Shakespeare, making Christie the most successful novelist in publishing history.