Hi.

I have 10 options. Among which, I want respondents to pick up three and mandatorily choose the respective dropdown list of 5 options.
I have read the following theme [url][/url]   github.com/tpartner/LimeSurvey-Multiple-Choice-Dropdown   
But I think the file is not available anymore. Could you please tell me how can I do?

Many thanks in advance.

It is like..
"Please choose 3 products that you have used and tell us how much was your satisfaction with those products?"

Hi,

But I think the file is not available anymore.

I do not see an issue.
Of course it is still available

The obstacle is: It is not compatible with version 6.x.

But you find the file for version 6.x. if you go tpartner's github homepage. Here you'll find it.
 

But now some remarks.
If there are only 10 options, a dropdown is really annoying for the respondent.
He has to click to open it, see which options are available, and again has to click to select the option.

If I see your scenario:
It should be sufficient to use a "multiple" question followed by an "array" to enter the satisfaction (here you use "array filter" to only display the selected products.
Or you use only one array with a last colum ("not applicanle / not used")
Or you use one "multiple with comment" question; in the comment the respondent enters the value of his satisfaction.

Joffm

Thank you for your answer. 
Currently I am following your suggestion, using multiple choice with comments and respondents enter their answer in the comments.

Nevertheless, I am still trying to discover multiple choice with dropdown to use in the future. I have downloaded and installed the Multiple choice dropdown x6 already. I can see the option Multiple Choice Dropdown (Type: M) in the list. However, I did not see where to enter the dropdown list.
In this link they mentioned about question theme  github.com/tpartner/LimeSurvey-Multiple-Choice-Dropdown-3x
But I could not see it in my web Limesurvey
Could you please tell me what I can do? My version is  LimeSurvey Cloud   Version 6.13.0

Sincerely thanks.

Did you follow the steps?

1. Extract the download, compress (zip) the Multiple-Choice-Dropdown folder and import via the theme manager.
2. Create a Multiple-Choice-Dropdown question, click Save.
3. Create subquestions as required.

1. means, you only import the Multiple-Choice-Dropdown folder, not the LimeSurvey-Multiple-Choice-Dropdown-6x-main folder

I can see the option Multiple Choice Dropdown (Type: M) in the list.

Which list?
Do you see it here?
 

or here at the bottom?
 
Then you have to install it.

If everything is fine, you should see the new question theme here
 

2. & 3. Create a question of this type, enter the subquestions.
 

BTW: I do not understand why you still insist on the theme for version 3.x.
You ignored the questions at that appeared at the beginning, so the question: Which version do you really use?

Joffm