The correct answer is: A. MIN
The Mobile Identification Number (MIN) is a unique number assigned to each mobile phone by the mobile network operator. It is transmitted along with the call initiation request during the origin of call by a mobile. The MIN is used to identify the mobile phone and to route the call to the correct mobile network operator.
The Electronic Serial Number (ESN) is a unique number assigned to each mobile phone by the manufacturer. It is stored in the mobile phone’s hardware and cannot be changed. The ESN is used to identify the mobile phone and to prevent fraud.
The Service Control Manager (SCM) is a software module that is responsible for managing the mobile phone’s services. It is stored in the mobile phone’s firmware and cannot be changed. The SCM is used to control the mobile phone’s features and to provide services such as call forwarding and voicemail.
The MIN is the only one of the three options that is transmitted along with the call initiation request during the origin of call by a mobile.