Explanation:

- Ritika ranks 13th from the top. This means there are 12 students above her.

- Sheetal ranks 34th from the bottom. In a class of 42, this means she is the 9th from the top.

- To find the number of students between Ritika and Sheetal, calculate the difference between their ranks from the top: 13 - 9 = 4.

- Therefore, there are 3 students between Ritika and Sheetal since counting the gap doesn't include either Ritika or Sheetal themselves.

Answer: Option 4 - 3

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