Answer: C
Z85.46 is the correct code here as it is used to code for personal history of malignant neoplasm of the prostate. Here, Alan has a history of prostate cancer which was removed 3 years back.
Option A is not correct because Z85.43 codes for personal history of malignant neoplasm of the ovary.
Option B is not correct because Z85.47 codes for personal history of malignant neoplasm of the testis.
Option D is not correct because Z85.48 is used to specify personal history of malignant neoplasm of the epididymis.