Common gender nouns can refer to both males and females. The subject of a verb is in the nominative case. Nouns can be categorized as countable or uncountable.
Common gender nouns are general nouns that can refer to both males and females. An example of a common gender noun is 'Teacher,' as it can describe a person of any gender. On the other hand, 'Actor' and 'Emperor' are more specific to gender, making them examples of masculine gender nouns.
The subject of a verb in a sentence is said to be in the nominative case. This case is used for the subject of a sentence, representing the doer of the action. Therefore, the correct option is (a) nominative case.
To categorize nouns as countable or uncountable, we use symbols where C stands for countable and U for uncountable. For example, 'cup,' 'minute,' and 'sentence' are countable, marked as C, while 'agriculture,' 'sand,' and 'health' are uncountable, marked as U.
https://brainly.com/question/39202738