Ayushmann ranks 19th in a class of 40 students. What will be its serial number from the last?

The logic followed here is:

Total number of students in the class = 40

Ayushmann's rank from the top = 19th

To find Ayushmann's serial number from the last, we use the formula:

Serial number from the last = (Total number of students) - (Ayushmann's rank from the top) + 1

So,

Serial number from the last = 40 - 19 + 1

= 21 + 1

= 22.

Hence, Ayushmann's serial number from the last will be 22nd.

Hence, the correct answer is "Option 1".