The correct answer is CMOS.
DTL (diode-transistor logic) is a type of digital logic that uses diodes and transistors to perform logic functions. It is a relatively simple and inexpensive logic family, but it dissipates a relatively large amount of power.
TTL (transistor-transistor logic) is a type of digital logic that uses transistors to perform logic functions. It is a more complex and expensive logic family than DTL, but it dissipates less power.
ECL (emitter-coupled logic) is a type of digital logic that uses transistors to perform logic functions. It is a very fast and complex logic family, but it dissipates a relatively large amount of power.
CMOS (complementary metal-oxide semiconductor) is a type of digital logic that uses complementary pairs of n-channel and p-channel MOSFETs to perform logic functions. It is a very fast, low-power, and complex logic family.
Therefore, the logic family that dissipates the minimum power is CMOS.