Consider the following statements regarding configuration of TTL devices:
1. The output impedance of totem pole transistor is high.
2. Open collector output devices have low switching speed.
3. Power consumption of Schottky devices is high.
4. Tri-state output devices have high switching speed.
Of these statements:

A. 1 and 2 are correct

B. 1, 3 and 4 are correct

C. 2 and 3 are correct

D. 2, 3 and 4 are correct

Answer: Option C