Goldsmid Line is the border between ______?

Goldsmid Line is the border between ______?

گولڈسمڈ لائن __________ کے درمیان سرحد ہے؟
Explanation

The Goldsmid’s line (1871), which marks the border between present-day Pakistan and Iran.

A year earlier in 1872, Goldsmid headed a commission that negotiated a new boundary between Afghanistan and Persia - the Selstan frontier.

The line stretched from Banda to Kuh-i-Malik Siah and followed the Helmand River.