Seoul, Feb 10: North Korea dismissed today an admission by Pakistan's top nuclear scientist that he sold nuclear weapons technology to the north and other states as ''nothing more than sordid false propaganda'' spread by the United States. The statement by a North Korean foreign ministry spokesman, published by Pyongyang's official Kcna news agency, said washington had fabricated revelations by Pakistani scientist Abdul Qadeer Khan in order to isolate north Korea in six-country nuclear talks later this month. It was Pyongyang's first reaction to the Pakistan news.