Checkboxes - getting score using JavaScript array?

Question

My code didn't work.
i got 4 checkboxes and I want to check two options
so I use this
function checkquest()
var question3 == "unknow"
var question3Array= document.getElementById("question 3").getElementsByTagName("input);
for(var i = 0; question 3Array.lengths; i++){
if (question3Array [i]. checked) {
question3 = question3Array [i].value
if(question3 == "unknow") {
errMsg = errMsg + "You need to answer...;
return false}
Else if(question3 == "A" and question3 == "C"{
return true:}
else {
return false
}

Answer 1

there is 4 options in this question