Eliminating selected options after selected once in repeat group

Hi,
I am developing a questionnaire for our monthly report on different sector. First question ask:
'How many sectors do you have to report?" Based on this answer, a group is repeated where list of all sectors, donors to the specific sectors (cascade) and brief activity is asked. Now, is it possible to hide the selected sectors in next repeat. For example:
Sector options in first repeat:
a. GBV
b. Site Management
c. WASH
d. Site Development
e. Protection
f. Disaster Risk Reduction

If (a). GBV is selected in first repeat, then sector in second repeat should be:
b. Site Management
c. WASH
d. Site Development
e. Protection
f. Disaster Risk Reduction

Though, after searching this community forum, I was able to restrict selecting one sector more than once. But, I would prefer to hide the options, not restricting as hiding is better than restricting.
Another problem with this developed tool is that this cascaded donor to their respective sector do not appears when I preview this form in my computer. But, it works fine when I deploy this form and try it in Kobo Collect apps in my android. Questionnaire attached for your better understanding.repeat group.xlsx (13.7 KB)
Any suggestions for this? Thank you so much in advance for your kind support.

@tasfik_rukan, you could do it as outlined in the post discussed previously:

Hi @Kal_Lam ,
Thanks for your kind response and support. I have been able to apply what you have just recommended.

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