Q. Which two nations share the longest international border in the world?
Answer: Canada and USA
Notes: Canada-United States Border, also known as International Boundary, is the longest international border in the world between two countries. The total length covers are 8891 kilometres. The Canada Border Service Agency and US Customs and Border Protection regulate and monitor the legal passage through the International Boundary.

This Question is Also Available in:

हिन्दी
This question has been sourced from GKToday's "40000+ GK / General Studies MCQs for SSC & State PCS Exams" App Exclusive Course in GKToday Android Application which provides more than 40K General Knowledge and General Studies questions with explanations asked in all Competitive Exams of India.
📌 Question Number: 124 in World Geography - Continents and Country Trivia in the above course in App.