The correct option is
D Anis's
The possessive form of a noun is formed using an 's.
The noun in question here is a proper noun, Anis.
Option B: The possessive form of the noun 'Anis' is Anis's. It's formed by adding an 's to it. Hence option B is correct.
Option A: The noun 'Anis' is not in the possessive case.
Option C: Anis' is not in the possessive case. It should be formed using an 's, whereas here it's just an '.
We use just an apostrophe ' when the noun is plural. But here, 'Anis' is not a plural noun. It's a proper noun and is singular.
Option D: Anises is a plural form of the noun Anis. But proper nouns do not have plural forms.
Hence options A, C and D are incorrect.