Correct Answer - Option 1 : 34
Mehak's position from the top = 7th
Mehak's position from the bottom = 28th
Total number of students in the class = Mehak's position from the top + Mehak's position from the bottom - 1
= 7 + 28 - 1
= 35 - 1
= 34
Hence, "34" is the correct answer.