Which amendment to the 1973 Constitution is largely credited with restoring the true parliamentary character by curtailing the President's discretionary powers to dissolve the National Assembly and making the Prime Minister the executive head?

The correct answer to the question "Which amendment to the 1973 Constitution is largely credited with restoring the true parliamentary character by curtailing the President's discretionary powers to dissolve the National Assembly and making the Prime Minister the executive head?" is Option B: 18th Amendment.

The other options — A) 17th Amendment, C) 19th Amendment, D) 20th Amendment — are incorrect for this Pakistan Affairs question. As explained above: The 18th Amendment (2010) significantly curtailed the President's powers, particularly by repealing Article 58(2)(b) which allowed the President to dissolve the National Assembly unilaterally. This s…