How to write "option" to read data for dropdown in angular

Question

Good Afternoon,

 

Below is the code to read the data from database:

while (dr.Read())
{
pROScrutinyDetails.type_treat = obj_DbNullHandler.CheckDBNullAndReturnNullableStringForDataReader(dr, "type_treat");
}

and it is reading 3 values and i want display as a dropdown showing all 3 values....so please do let me know how to write the <option> for the same!!

 

i tried the below but it is not working:

 

<option [value]="item.type_treat" *ngFor="let item of f">{{item.type_treat}}</option>

 

Thank you