Which of the following countries has a border with Pakistan that is approximately 2,430 kilometers long?

Correct Answer: A: Afghanistan

Explanation: The correct answer is Afghanistan, with which Pakistan shares a border of approximately 2,430 kilometers. The Pakistan-Afghanistan border, also known as the Durand Line, was established in 1893 and has been a subject of dispute between the two countries. Options like India, Iran, and China are incorrect, as their borders with Pakistan are significantly shorter. The Pakistan-Afghanistan border has significant geopolitical implications, and its management is crucial for regional stability. This topic is often covered in FPSC, CSS, and NTS papers, highlighting Pakistan's border management and regional relations.