Question: For a UTRA FDD UE supporting DB-DC-HSDPA, which HSDPA UE capability categories are subject to receiver single link performance requirements for HS-DSCH in multi-path fading environments, assuming support for enhanced performance requirements type 3 or 3i?
Option 1: Categories 12, 15, and 18
Option 2: Categories 23, 24, 27, and 28
Option 3: Categories 5, 7, and 10
Option 4: Categories 20, 21, and 22
Explanation: The correct answer is Option 2 because UTRA FDD UEs supporting DB-DC-HSDPA with HSDPA UE capability categories 23, 24, 27, or 28, and supporting enhanced performance requirements type 3 or 3i, are subject to receiver single link performance requirements for HS-DSCH in multi-path fading environments.