The sentence is incomplete, the complete form is "The name BLANK ....(be)... a doctor, but hís father BLANK ...(be)... a farmar. Hence, the answer to it is verb is.
A grammatical Concord is a grammatical rule which states that a singular subject takes a singular verb and a plural subject takes a plural verb.
Therefore, the correct answer is as given above.
learn more about grammatical Concord: https://brainly.com/question/21146799
#SPJ1