Which logic family provides highest switching speed?

Option 1 : Emitter-Coupled Logic

Emitter-Coupled Logic:

ECL is a non-saturated logic.

It is the fastest logic among all hence called "current mode logic" (Option 1 is correct)

It proved wired 'OR' logic 

It uses a negative power supply to avoid noise and glitches.

Transistor-Transistor Logic:

TTL circuits are:

Tristate logic, Totem pole logic, Open collector logic

Totem poles reduce power dissipation and increased the speed of operation over open collector logic.

Diode-Transistor Logic: 

It provides Wired "AND" logic.

Complementary MOSFET:

 CMOS is a combination of NMOS and PMOS  

They provide low power dissipation and excellent noise immunity.