Select the most appropriate option to fill in the blank in the following sentence:

Aman has been spending a lot of money on buying expensive, branded clothes. If he continues with his shopping spree, he __________ all his money by the end of the month.

Option 1: will be spending -> Future continuous tense indicates an ongoing action, but doesn't convey completion by a specific time.

Option 2: will have spent -> Future perfect tense correctly indicates an action that will be completed by a specific point in the future ("by the end of the month").

Option 3: shall spend -> Simple future tense doesn't emphasize the completion of spending all money by a deadline.

Option 4: will spend -> Simple future tense suggests the action will happen but doesn't convey that it will be completed by the specified time.

Hence, Option 2: will have spent -> The phrase "by the end of the month" requires future perfect tense (will have + past participle) to indicate that the action of spending will be completed before that specific future time, resulting in all his money being exhausted -> correct