The correct answer is (c), LTE. LTE stands for Long Term Evolution, and it is a 4th generation (4G) mobile technology. It is a standard for wireless communication of high-speed data for mobile phones and data terminals. LTE is the successor to 3G UMTS and the predecessor to 5G NR.
GPRS stands for General Packet Radio Service, and it is a 2.5G mobile technology. It is a packet-switched technology, which means that data is transmitted in small packets rather than in a continuous stream. GPRS is slower than 3G and 4G technologies, but it is still widely used in developing countries.
HSPA stands for High Speed Packet Access, and it is a 3G mobile technology. It is an upgrade to UMTS, and it offers higher speeds than UMTS. HSPA is widely used in Europe and Asia.
(d), All of these, is not the correct answer because GPRS is not a 4G mobile technology.