Who was known as the Iron Lady?

The title "Iron Lady" is famously associated with Margaret Thatcher, who served as the Prime Minister of the United Kingdom from 1979 to 1990. This nickname was attributed to her due to her strong, uncompromising leadership style and her tough stance on various political issues, particularly during the Cold War. Thatcher's policies, which emphasized free-market principles and her confrontation with trade unions, reflected her determination and resilience, traits that solidified her reputation as a formidable politician.

While other prominent leaders, such as Angela Merkel, Indira Gandhi, and Golda Meir, also demonstrated strong leadership qualities, none were widely recognized by this specific moniker. Therefore, Margaret Thatcher is the one who is most accurately referred to as the Iron Lady, making this the correct choice.