With reference to communication technologies, what is/are the difference/differences between LTE (Long-Term Evolution) and VoLTE (Voice over Long-Term Evolution)? 1. LTE is commonly marketed as 3G and VoLTE is commonly marketed as advanced 3G. 2. LTE is data-only technology and VoLTE is voice-only technology. Select the correct answer using the code given below.

Option (d) is correct because both statements are factually inaccurate: LTE and VoLTE are 4G technologies (not 3G), and VoLTE is a standard that allows voice to be carried as data packets over the LTE network rather than being a "voice-only" technology. Statement 2 is the most tempting error because while LTE was initially data-centric, VoLTE actually integrates high-quality voice into the 4G data stream. The core concept tested is the evolution of mobile communication standards and the technical transition from circuit-switched to packet-switched voice services in 4G networks.