The correct option is A her
The direct object in the given sentence is 'some chocolates'. We need to fill in the blank with an indirect object. Indirect objects answer the question 'to whom?' or 'for whom?'.
Option A: 'Her' is an object pronoun. It functions as the recipient of the direct object 'chocolates'. Hence this option is correct.
Option B: 'To her' is used when the indirect object is placed after the direct. (He's taking some chocolates for her') Also, 'to her' isn't relevant here as it does not answer the required question 'for whom?'.
Hence option B is incorrect.
Option C: 'Hers' is a possessive pronoun and expresses belongingness of something. 'This purse is hers.' The given sentence does not express possession, hence C is incorrect.
Option D: 'She' is a subject pronoun. It is used when the pronoun performs an action. But here, it receives the action. Hence D is incorrect.