Every optional has a “cut-off ” mark. Hence, is it better to choose  one with a low “cut-off”?

What do you mean by cut – off? Only 10,000 qualify at the preliminary. The marks scored by the last candidate is the cut – off . Thus all candidates who score more than the cut – off will qualify and all those who don”t will not. Ou should remember that this is the competitive examination. There is no qualifying score. Whatever the marks, the first 10,000 ( this figure also subject to change – depends on number of vacancies) candidates will qualify. Thus, cut – off mark changes from year to year. If the questions are difficult the “cut – off ” automatically comes down