As compared to TTL, CMOS logic has

Option Explanation-

Option(1)- Schottky transistors are  preferred for TTL logic systems. These transistors portray the Schottky effect and thus have higher switching speed in comparison to CMOS logic family.So option 1 is false.

Option(2)- TTL dissipates a lot of power where as CMOS uses almost no power in the static state (that is, when inputs are not changing). So option 2  is false.

Option(3)- TTL  requires more space and isolation in comparison to CMOS logic family. The required silicon area for implementing  CMOS  is very small. So option 3  is true.

Important Point-

1. Characteristics of CMOS Logic Families-

• Has the highest fan-out, when compared with TTL and ECL
• Works well over a wide range of temperature
• Noise immunity is better than TTL and ECL

2. Characteristics of TTL Logic Families-

• Fastest saturation, when compared to other logic families
• Low output impedance for all states
• TTL dissipates a lot of power, thus not making it suitable for battery-powered devices.