Islamabad [Pakistan], February 25 (ANI): The opposition parties, including Pakistan Tehreek-e-Insaf (PTI), Jamat-e-Islami and the Grand Democratic Alliance (GDA), have called off their joint protests in Karachi and announced their plans to observe “Black Day” across Sindh on February 27, ARY News reported. The protests were organised against alleged rigging in the February 8 general elections. Addressing the media at the Karachi Press Club, the leaders of the opposition parties announced plans to observe ‘Black Day’ across Sindh on February 27, adding that the three parties would ensure full p…