Shaista Ikramullah was:

Shaista Ikramullah was a highly influential and multifaceted personality in Pakistan's history. She was indeed a politician, serving as a member of the Constituent Assembly of Pakistan and playing a role in drafting the country's constitution. Beyond politics, she was a prolific author, penning several books and articles that offered insights into women's rights and social issues. Furthermore, her career as a diplomat saw her representing Pakistan at various international forums, including the United Nations. Therefore, all the listed roles accurately describe her significant contributions, making 'All of these' the correct answer.