TEHRAN (AFX) - The head of Iran's powerful Revolutionary Guards warned that the imposition of sanctions on the Islamic republic over its nuclear programme could push the price of oil to 100 usd a barrel. 'Any sanction against Iran can make the oil price reach 100 dollars a barrel,' General Yahya Rahim Safavi said in a speech to worshippers attending Friday prayers in Tehran. Iran is OPEC's second producer. 'Any economic and political pressure on Iran from any power ... will result in a harsh reaction from Iran,' he added. The Islamic republic 'has a solid and unbeatable defence potential...