[Answer] Which blood type is the rarest in the world?

Step 1 : Introduction to the question "Which blood type is the rarest in the world?"

...AB- is the least common blood type in the world, found in roughly 1% of the global population. Its rarity comes from the combination of two uncommon traits: the AB blood group, which already appears infrequently, and a negative Rh factor, which further narrows the pool. While people with AB blood types are considered universal recipients within the ABO system and can receive red blood cells from any ABO group, those who are Rh-negative can only safely receive Rh-negative blood. As a result, AB- blood is extremely difficult to source.

[Answer] Which company is credited with creating the world’s first handheld cell phone?

Step 1 : Introduction to the question "Which company is credited with creating the world’s first handheld cell phone?"

...In 1973, engineer Martin Cooper of Motorola led the team that developed the world's first handheld cellular mobile phone, known as the Motorola DynaTAC prototype. Cooper famously made the world’s first public cell phone call while standing on a New York City street, calling a rival at Bell Labs to announce the breakthrough. While earlier mobile phones existed in cars and required bulky equipment, Motorola’s device was the first truly portable, personal cell phone—laying the foundation for the global mobile communications revolution that followed.

[Answer] What image appears on the world’s rarest postage stamp, the famous British Guiana 1¢ Magenta?

Step 1 : Introduction to the question "What image appears on the world’s rarest postage stamp, the famous British Guiana 1¢ Magenta?"

...Issued in 1856 in what is now Guyana, the British Guiana 1¢ Magenta is widely regarded as the rarest and most valuable stamp in the world, with only a single known example in existence. The stamp depicts a sailing ship surrounded by the Latin motto “Damus Petimus Que Vicissim” (“We give and expect in return”). Originally printed as a temporary local issue and used for newspaper postage, the stamp’s modest design contrasts sharply with its extraordinary value, which has reached tens of millions of dollars at auction.

[Answer] In 2008, the U.S. government confirmed which celebrity had been secretly part of a World War II spy organization?

Step 1 : Introduction to the question "In 2008, the U.S. government confirmed which celebrity had been secretly part of a World War II spy organization?"

...In 2008, newly declassified government documents revealed that Julia Child, long celebrated as America’s most famous TV chef, had worked for the Office of Strategic Services (OSS) during World War II—the wartime intelligence organization that later evolved into the CIA. Recruited in the early 1940s, Child served primarily in Washington, D.C., and later overseas, where she was entrusted with sensitive assignments involving classified research, communications, and administrative work supporting Allied intelligence operations.

[Answer] Which breakfast chain owns a record label and stocks its jukeboxes with its songs?

Step 1 : Introduction to the question "Which breakfast chain owns a record label and stocks its jukeboxes with its songs?"

...What does Jay-Z And Waffle House have in common? They both own their own record label. The beloved 24-hour breakfast chain has its own record label that creates songs unique to the Waffle House experience. "There are Raisins in My Toast" and “Cooking Up Your Order” are just a couple of the 40-plus original songs that Waffle House has released since the mid-1980’s on its own record label, called Waffle Records. The songs range from gospel to bluegrass to rock & roll –and, of course, include some company branding.