Who among the following has been appointed as first Women Treasury Secretary in United States of America ?

Janet Yellen is the correct answer. She was confirmed and sworn in as the 78th US Secretary of the Treasury in January 2021 under President Joe Biden, becoming the first woman to hold the post. Do not confuse this with her earlier milestone: she chaired the Federal Reserve from 2014 to 2018, the first woman to do so.

Why the others are wrong:

• Lloyd Austin (spelt Lyoyd in the option) was the US Secretary of Defense, the first African American to hold that office.
• Merrick Garland (spelt Gardand in the option) is the US Attorney General, heading the Department of Justice.
• Tullipan is not a name I can link to the US Treasury or any cabinet post, so it is a distractor.

Core concept: the Treasury Secretary heads the Department of the Treasury and acts as the chief financial officer of the federal government, a cabinet-level post. For Mains GS-3 this connects to the Fed-Treasury relationship and coordination between monetary and fiscal policy.

Trap: mixing up the Treasury Secretary with the Federal Reserve Chair, since Yellen held both roles.