Best Online CAT Coaching

Since the turnover of applicants is already quite high, investing money on designing an attractive advertisement would be redundant.
Note that 4 talks about an 'attractive' investment and not an appropriate advertisement, and hence, would not be suitable. Thus, we need to order 1,2,3 and 3 now, as these are better than 4, which is directly eliminated.
1. The problem here is to sift the candidates from such a large pool. Since 1 does not provide a way to do that, and advises to go the long route, it would not be that effective.
2. Filtering the candidates, in the beginning, would ensure that only the right and motivated candidate make it to the interview. Hence, 2 would be the most effective.
3. Following the last year's procedure would be the least effective as it might not be prepared to deal with the increased influx of applications.
Thus the decreasing order of effectiveness would be 2, 1, 3.