The question above is incomplete; the options attached to the question is given below:
A. Woman → womans
B. Moose → meese
C. Child → children
D. Sheep → sheeps
ANSWER
The correct option is C.
In English language, singular refers to a single thing while plural refers to two or more things. There are many ways of forming plurals of words, depending on the word concerned. At time letter 's' is added to form the plural form; this is the most common means of forming plurals. In the question given above, all the options are wrong with the exception of option C.The plural of child is formed by adding 'ren' to the singular form.