Islamabad [Pakistan], July 7 (ANI): The Pakistan Tehreek-e-Insaf (PTI) has rejected the resignation of its Secretary-General Omar Ayub Khan. It said that Omar Ayub will continue serving on the post in line with instructions given by PTI founder Imran Khan, The News International reported, citing a party statement. In June, Omar Ayub stepped down as the secretary-general of PTI “to focus” on his role as the Leader of the Opposition in the National Assembly of Pakistan. However, PTI’s core committee and parliamentary party opposed his step, asking him to withdraw his decision to step down from t…