Likely Question to be asked:
Based on the question there are two ways to figure how which LMI type is being used: show interfaces, and show frame-relay LMI. Below lists the output from each command to display where the LMI type is located.
Scroll down until it displays the interface which Frame-Relay is being used on, simply look at the encapsulation method to confirm that Frame-Relay is being used.
R0#show interface serial "interface" is also a valid command if the interface is known.
R0#show frame-relay lmi