Final answer:
In the given options, NAOH is a strong base, while NH3 and H2CO3 are weak bases.
Step-by-step explanation:
A strong base is a base that is 100% ionized in solution, while a weak base is less than 100% ionized. In the given options, NH3 (ammonia) and H2CO3 (carbonic acid) are weak bases.
- C C OHCl - Not a base
- NAOH - Strong base
- NH3 - Weak base
- H2CO3 - Weak base