Trump for being the 1st sitting US president to enter North Korea

United States President Donald Trump became the first sitting US president to set foot in Democratic People's Republic of Korea (or North Korea) when he met its leader, Kim Jong Un, in Demilitarised Zone (DMZ) between North Korea and South Korea.

Details:

• President Donald Trump met North Korean leader Kim Jong Un at the border village of Panmunjom in the Demilitarized Zone, South Korea and agreed to resume stalled nuclear talks.
• This was the third meeting between two leaders in just over a year on an old Cold War frontier that for decades has symbolised hostility between their countries, which are technically still at war.
• Trump while escorted by Kim, briefly crossed a military demarcation line into North Korea and moments later, they returned to the South Korean side and joined South Korea's President Moon Jae-In for a brief chat, marking an unprecedented 3-way gathering.

About previous US-North Korea Meets:

• 1st Summit:
• The first summit was held in 2018 between North Korean Chairman Kim Jong-Un and U.S. President Donald Trump in Singapore city, called as the North Korea-United States Singapore Summit or Singapore Summit.
• At the summit, a joint statement was signed between the two agreeing to security guarantees for North Korea, denuclearization of the Korean Peninsula, new peaceful relations, recovery of soldiers' remains, and follow-up negotiations between high-level officials.
• 2nd Summit:
• The second summit was held in February 2019 in Hanoi, Vietnam and was called as the North Korea-United States Hanoi Summit, or Hanoi Summit.
• This meet was cut short and no agreement was reached as the two sides failed to narrow differences between them.
• The US demanded North Korea to give up its nuclear weapons and North Korea demanded relief of sanctions.

Question:

Q. United States President Donald Trump became the first sitting US president to set foot in which country?
a. Venezuela
b. North Korea
c. Cuba
d. Iceland