The frequency points of the NB-loT inband and Guardianband cells can be configured arbitrarily in the supported frequency bands.

The statement is incorrect. In-band and guard-band deployment modes for NB-IoT are constrained by the host LTE carrier's frequency structure. The 180 kHz NB-IoT carrier must be placed on specific Physical Resource Blocks (PRBs) within the LTE channel grid to ensure coexistence and avoid interference. Its position is therefore determined by the LTE system's configuration and is not arbitrary. Only the standalone deployment mode offers more flexibility in frequency selection, as it uses a dedicated spectrum, such as a refarmed GSM channel.

A. Correct: This is false because the placement of in-band and guard-band NB-IoT carriers is strictly limited by the frequency raster and resource block structure of the overlay LTE network.

1. Huawei Technologies Co., Ltd. (2018). NB-IoT System Description. Section 3.2, "Deployment Modes." This document details the three deployment modes (in-band, guard-band, standalone) and the frequency allocation constraints for each.

2. 3GPP TS 36.300, "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2." Release 13, Section 4.5.15, "NB-IoT." This specification outlines the relationship between NB-IoT and LTE carriers.