It is highly unlikely that Iran would attack North Korea since the two countries are allies. It is possible, but still very unlikely, that Iran would attack South Korea. There would be no reason to justify it from an Iranian Foreign Policy Perspective.
I can think of 3 ways to answer this -In terms of land, Iran has a larger land mass than South Korea (1,648,195 km2 Iran vs. 99,392 km2 Korea)In terms of population, Iran has a larger population than South Korea (74,196,000 Iran vs. 48,758,000 South Korea - both are 2009 statistics)In terms of the economy, South Korea produces more wealth than Iran ($1.364 trillion GDP [$27,978 per capita] South Korea vs. $858,652 billion [$11,395 per capita] Iran - both adjusted for purchasing power parity)
North Korea attacked South Korea.
Iran uses Tyranny in modern times. In 1939, Iran used it.
Iraq, Iran, and north Korea
North Korea and Venezuela.
No.
Probably how they did a surprise attack on South Korea.
Canada beats Iran and Korea
China and Iran
north korea, Iran,
Iran, Cuba, and N. Korea
North korea