The Answer is D, cause the first for returns a list of 200 records, so the database.update will run one in every 200 records, 20000/200 = 100 and the DML limit is 150

i think ans is C. The query brings 20 000 records which is within limit of 50 000. the second For loop process each records and updates the list if conditions matches. At the end of the second for loop a database update is done via database.update method option false so it will allow a max of 10 000 records to be updated. Any records after the 10 000 will fail and will be recorded in database.saveResult.

@Topper of the World , Please explain answer in detail.

Ans: The total number of DML statements issued will be exceeded