The correct answer is option 3, which states that the ascending order of these languages in terms of the number of speakers is 3, 4, 2, 1.

To better understand the answer, let`s analyze each option:

Option 1: 4, 3, 2, 1 - This option suggests that Telugu (4) has the highest number of speakers, followed by Italian (3), Japanese (2), and finally Bengali (1). However, this is not the correct order.

Option 2: 3, 4, 1, 2 - This option states that Italian (3) has the highest number of speakers, followed by Telugu (4), Bengali (1), and finally Japanese (2). This order is also incorrect.

Option 3: 3, 4, 2, 1 - This option correctly states that Italian (3) has the highest number of speakers, followed by Telugu (4), Japanese (2), and finally Bengali (1). This is the correct ascending order of languages based on the number of speakers.

Option 4: 4, 3, 1, 2 - This option suggests that Telugu (4) has the highest number