What was the original name of Chicago’s Willis Tower?

Here is the question :

WHAT WAS THE ORIGINAL NAME OF CHICAGO’S WILLIS TOWER?

Here is the option for the question :

• John Hancock Center
• Sears Tower
• Wrigley Building
• Amoco Building

The Answer:

And, the answer for the the question is :

Explanation:

[STC008394]. Many Chicagoans continue to refer to the 110-story building situated at 233 South Wacker Drive as the Sears Tower, despite the fact that the building’s official name has changed to the Willis Tower. The completion of construction on the Sears Tower in 1973 made it the tallest skyscraper in the world. It maintained that distinction for the next 25 years, until it was surpassed in height by the Petronas Towers in Malaysia. In 2009, it received its current name, Willis Tower, in honor of an insurance business.