Question: What type of cells can be the source in an Intra-E-UTRAN Neighbouring Cell Relation (NCR) as represented by a specific IOC?
Option 1: EUtranGenericCell instance
Option 2: UtranGenericCell instance
Option 3: GsmCell instance
Option 4: Both EUtranGenericCell and ExternalEUtranGenericCell instances
Explanation: According to the definition of NCR for Intra-E-UTRAN scenarios, the source cell in such a relation is specifically identified as an EUtranGenericCell instance. This indicates that within the E-UTRAN network, neighbouring cell relations originating from another E-UTRAN cell are defined by this particular type of cell instance. Options 2 and 3 refer to inter-RAT scenarios involving UTRAN and GERAN, respectively, which do not apply to an Intra-E-UTRAN context. Option 4 is incorrect because while ExternalEUtranGenericCell can be a target, the question specifically asks about the source in an Intra-E-UTRAN NCR.