Look at the picture and choose the correct option that should be in capital letter.

Are you going to meet john today?

The correct answer is: John

John should be in capital letters. Because, according to grammar in english, all nouns should be started in capital letter. This rule should be followed at all the times. Never mind about the place of the noun in a sentence. Even if the noun comes in between a sentence, the particular noun word should be started with a capital letter. Hence, here John is a name of the person and it is a noun. But it is written in small letter. So, it should be capitalized.