Hello. I'd like to add a radio or a drop-down input... I define the variables like so:
n1: Al2O3;
n2: MgSO4;
n3: MgCO3;
n4: SiO2;
ta3: n1,true],[n2,false],[n3,false],[n4,false;
ta3: random_permutation(ta3);
I set the input type to drop down list, model answer to ta3; answer test to algequiv, SAns: ans3 and the TAns: Al2O3. When the student chooses the correct answer, the evaluation says it's not correct. Please, can anyone tell me what's the problem? Thank you.