Select the option that expresses the given sentence in active voice.

My pocket has been picked.

Someone has picked my pocket.

The correct option that expresses the given sentence in active voice is Someone has picked my pocket.

The other options are incorrect because:

• My pocket has been picked is in the passive voice.
• Someone’s pocket has been picked by me is grammatically incorrect. The subject of the sentence is "me," which is not the one who picked the pocket.
• Someone had my pocket picked is in the past perfect tense, while the original sentence is in the present tense.
• I picked someone’s pocket is in the active voice, but it does not specify who picked the pocket.