Constitution of Pakistan consists of — articles:

A constitution is a foundational document that outlines the structure of government, powers, and fundamental rights, typically organized into articles. The Constitution of Pakistan 1973 is a comprehensive document that has undergone several amendments since its promulgation. The correct answer is B: 280. The original Constitution of Pakistan 1973 was structured with 280 articles, divided into twelve parts and six schedules. While subsequent amendments have added or modified certain provisions, the core numbering and structure generally refer to this original count. Distractor A, 270, is too low. Distractors C, 290, and D, 300, are too high. These numbers are close but do not reflect the precise number of articles as originally enacted in the 1973 Constitution.