Why do you think that Iran is more dangerous than Pakistan, can you give me some reasons please? I have never thought that someone may consider Iran as a threat to other, big and developed countries.
But i have to agree, North Korea is probably more dangerous than the previously mentioned country. Indeed, Pakistan has really huge amount of uranium resources, but they are not so stupid to start a nuclear war without any reason.

I would not be so sure about North Korea, they are the threat to the peace on our planet, because they are totally not afraid of launching their nuclear rockets on some independent country.

I hope that everybody knows what is going to happen when anyone will launch nukes aimed in different country?
An apocalypse.