LAHORE, Aug 19 (INP): Following the Pakistan Awami Tehreek (PAT), Pakistan Peoples Party (PPP) and Pakistan Tehreek-e-Insaf (PTI) on Saturday challenged the approval of Begum Kulsoom Nawaz’s nomination papers for the by-election in NA-120 in election tribunal. PPP candidate Faisal Mir and PTI’s Dr Yasmeen Rashid, who are in the run for the National Assembly seat, challenged the returning officer’s decision of accepting Kulsoom’s nomination papers as the PML-N candidate for NA-120. INP/LK/AH