Explanation:

- Tehmina Janjua made history as the first woman in Pakistan to become the Foreign Secretary.

- Foreign Secretary: This role involves overseeing the country's foreign affairs and representing Pakistan globally—a significant achievement for women in public service.

- Foreign Minister: This is a cabinet position, but Tehmina did not hold this role.

- Judge of a High Court: This position is part of the judiciary, different from being involved in foreign relations.

- Ambassador: While ambassadors represent their countries abroad, Tehmina's historical achievement was specifically as Foreign Secretary.

So, the correct answer is that she was the first female Foreign Secretary of Pakistan.