Islamabad [Pakistan], April 22 (ANI): The ruling Pakistan Muslim League-Nawaz (PML-N) has taken the lead in the by-elections held on 21 vacant and national and provincial assembly seats on Sunday, as per unofficial and preliminary results, Pakistan-based Geo News reported. After the swearing-in of the new assemblies, Pakistan’s first by-elections were held amid incidents of clashes between workers of different political parties in Punjab. PML-N has won in one National Assembly seat and seven provincial assembly seats. PML-N was leading in one National Assembly seat and leading in four provinci…