The given question is about identifying which one of the listed options is not among the SAARC agreements approved for signing at the 18th SAARC Summit. The options provided are:
1. SAARC Regional Railways Agreement
2. SAARC Motor Vehicles Agreement
3. SAARC Framework Agreement for Energy Cooperation (Electricity)
4. SAARC Inter governmental Transport Connectivity
Among these options, the agreement that is not part of the SAARC agreements approved during the mentioned summit is:
SAARC Inter governmental Transport Connectivity
The other three agreements are indeed those which were passed to enhance cooperation within South Asian countries in their respective sectors, with focuses on railway, motor vehicles, and energy cooperation. Therefore, "SAARC Inter governmental Transport Connectivity" does not fit into the established agreements in this context.