Setting value of items based on a radio group selection

Hi,
I have a radio group with 3 values (let's say A, B, C)... at the moment I have dynamic actions set to hide and unhide items based on the selection from the radio group...
e.g when value A is selected then only item_1 and item_2 are displayed, when value B is selected then only item_3 and item_4 are displayed... and so on...
idea was to let users to only enter information related to specific selection... but with what I currently have, users can select option A from the radio group and can enter information in item_1 and item_2 and then they can change there minds and select option B and start entering information in item_3 and item_4 and when they save the form they potentially could have information in all items (item_1 to item_4 and so on)...
Is there a way I can set the value of certain items to null based on the selection from the radio group... e.g when user select option A, then values of item_3 and item_4 be set to null and if they select option B, then values of item_1 and item2 be set to null...
Please advice how to approach it the best... I would appreciate a step by step solution as I am a new bee...
Thanks in advance

Hi,
You can hide and disable other items.
Disabled items values are not submitted.
And you can create after submit computation that set NULL to item session state according your radio group state
Regards,
Jari

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Setting value of items based on a radio group selection

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