On the Hong Kong Government Telephone Directory homepage, identify the number of distinct government bureaus, departments, and related organizations listed in the '決策局 / 部門 / 有關機構' (Bureau / Department / Related Organization) dropdown menu. State the total count.
Navigate to the Hong Kong Government Telephone Directory homepage (directory.gov.hk). Locate the '決策局 / 部門 / 有關機構' (Bureau / Department / Related Organization) dropdown menu (id: 77). Count the total number of unique options available in this dropdown, excluding '所有' (All).
Successfully navigate to the Hong Kong Government Telephone Directory homepage. Correctly identify and count the number of distinct government entities listed in the specified dropdown menu. State the total count of distinct entities as 90.