Hi ODK Community,
I'm trying to build a form in ODK Central (targeting Enketo/Web and also ODK Collect), where:
The user selects a village (from a static list).
I have a entity dataset called farmerlist with fields: name, label, villagename.
Based on the selected village, I want to loop through all matching farmers in a select input.
Hi @Naveen_kumar and welcome to the community,
Please take some time when you get a chance to introduce yourself here 
You will have to use a choice_filter criteria in your select_one_from_file farmerlist.csv question and it should be something like
villagename = ${village}
${village} is the question where you select the village.
Here the doc relative to Filtering options in select questions