SFP stands for Small Form-factor Pluggable, which is a compact, hot-swappable network interface module that can be used for both telecommunication and data communications applications1.
SFP transceivers can support different types of media and interfaces, such as copper or fiber cables, and have different data rates and distances1.
Depending on the type of cable used, SFP transceivers feature different connectors. Generally speaking, SFP, SFP+ and SFP28 modules will use either LC or RJ45 connectors, depending on whether the cable is copper or fiber2.
LC stands for Lucent Connector, which is a small form-factor fiber-optic connector that has a 1.25 mm ferrule and a push-pull coupling mechanism3. LC connectors are widely used for SFP transceivers that operate on fiber-optic cables14.
RJ45 stands for Registered Jack 45, which is a standard connector for twisted pair copper cables that has eight pins and a modular design3. RJ45 connectors are used for SFP transceivers that operate on copper cables, such as 1000BASE-T SFP14.
MT stands for Mechanical Transfer, which is a type of fiber-optic connector that has multiple fibers aligned in a ferrule and a pin-and-guide-hole alignment mechanism3. MT connectors are used for high-density applications, such as QSFP transceivers that operate on fiber-optic cables2.
F-type stands for Female Type, which is a coaxial cable connector that has a screw-on design and a 75-ohm impedance3. F-type connectors are used for cable television, satellite television, and other radio frequency applications3.
Therefore, the correct answer is B. LC, because it is the most common connector for SFP transceivers that operate on fiber-optic cables, which is the case in the question.
Reference:
1: Small Form-factor Pluggable - Wikipedia
4: Cisco SFP Modules for Gigabit Ethernet Applications Data Sheet
2: SFP & QSFP Transceivers Explained - Cable Intelligence
3: SFP Connector Types & Wiki - QSFPTEK