The correct answer is 1 Key Points According to subject-verb agreement, a singular subject takes a singular verb and a plural subject takes a plural verb. Example: Ram goes to the temple every day. ​ She is one of the best artists who have ever lived. There are certain nouns that are singular in form but plural in meaning. Such nouns must take a plural verb. cattle, poultry, peasantry, children, gentry, police, people, cavalry, infantry, etc. Example: The police have caught the thieves. The given sentence is in the simple present tense. Thus, 'say' should be used in place of 'says' ​Complete sentence: The police say the suspect has a slight blemish on his left cheek.