Which is the strongest base?

[Sandman327]

1. The problem statement, all variables and given/known data
Which of the following species is the strongest base?
A. NH2-
B. OH-
C. Cl-
D. NH3
E. I-


2. Relevant equations



3. The attempt at a solution
Ok I know that Cl- is a very weak base so I know it is not that one for sure. I want to say that the answer is NH2- because it is the most likely to receive a proton as compared to the others but can someone please let me know if my thought process is right here?

[Borek]

Looks OK.

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[chemisttree]

How did you determine that NH2- was more likely to receive a proton than OH-?

I assume that NH2- is actually NH2- ?