Judicial members of the Hong Kong Special Administrative Region are __________ from legal action in their judicial functions.

Judicial members of the Hong Kong Special Administrative Region (HKSAR) enjoy a legal principle known as judicial immunity, which protects them from legal action arising from their judicial functions. This immunity is crucial in maintaining the independence of the judiciary by allowing judges to make decisions without the fear of personal liability for their rulings, provided those actions are performed within the scope of their judicial duties. This principle is vital for upholding the rule of law and ensuring that justice can be delivered fairly and impartially.

The terms "susceptible," "vulnerable," and "exposed" imply a heightened risk of liability or accountability, which contradicts the foundational legal concept of judicial immunity. These alternatives suggest that judicial members might face legal repercussions for their decisions, undermining their ability to function effectively and freely in their roles. Hence, the correct choice underscores the protection afforded to judicial members in their official capacity, which is essential for the functioning of a fair and independent judicial system.