According to the Corporate Governance Code of the Hong Kong Listing Rules, what must the board disclose about its internal audit function?

ID : 1880

Long answer : The board must disclose whether it has an internal audit function and its effectiveness. (Source: https://en-rules.hkex.com.hk/sites/default/files/net_file_store/HKEX4476_3828_VER36626.pdf)

Short answer : Whether it exists and its effectiveness.

answer 2 : Only external audit details.

answer 3 : Only financial statements.

answer 4 : Only IT system audits.