Iran’s Foreign Minister Mohammad Javad Zarif said the document signed by Iran and the 5+1 member states focuses on Iran’s right for uranium enrichment, Irna reported Tuesday. He made the remarks in a press conference held after the 21st ministerial meeting of the Economic Cooperation Organization. Iranians proved that the nuclear issue would only be solved through negotiations based on mutual respect and on equal footage. Thus the only option is to enter the talks with caution and optimism and with wide open eyes, Zarif said. He said he believes no issue would remain unresolved in the nuclear field with a firm political resolve.