Likely to do with the number of students taking the test. As N, number of students taking the test, grows - it just makes more sense to use a form which is easy

Likely to do with the number of students taking the test. As N, number of students taking the test, grows - it just makes more sense to use a form which is easy to automatically grade. I'm not how sure how many students are taking these test, but given that it's in India, we're probably talking about tens to hundreds of thousand students.