Which city was under siege for more than two years during the war?

Here is the question :

WHICH CITY WAS UNDER SIEGE FOR MORE THAN TWO YEARS DURING THE WAR?

Here is the option for the question :

Barcelona, Spain
Belgrade, Yugoslavia
Leningrad, Soviet Union
Lisbon, Portugal

The Answer:

And, the answer for the the question is :

LENINGRAD, SOVIET UNION

Explanation:

[STC0019349]. The German troops surrounded the northern city of Leningrad (now St. Petersburg) on September 8, 1941. One of Hitler’s goals was to destroy it, and the death toll over the next few years was tremendous. In early 1944, the Soviet army used around 1,600 tanks to liberate the city.