Sanjeev scored the highest marks in the class. Rahul scored more than Nirbhay but lesser than Sameer. Arpit scored more than Rahul. Who got the 4th Rank out of the five?

Let's organize the scores based on the given information:
Sanjeev scored the highest marks: Sanjeev>others

Rahul scored more than Nirbhay but less than Sameer: Sameer>Rahul>Nirbhay

Arpit scored more than Rahul: Arpit>Rahul

Combining these conditions:

Sanjeev is clearly Rank 1.

Nirbhay has fewer marks than Rahul, while Sameer, Arpit, and Sanjeev all have more marks than Rahul. This means there are exactly three people ahead of Rahul (Sanjeev, and some arrangement of Sameer and Arpit) and one person behind him (Nirbhay).

So the ranks from 1st to 5th are:

1st Rank: Sanjeev

2nd/3rd Rank: Sameer / Arpit

4th Rank: Rahul

5th Rank: Nirbhay

Therefore, Rahul holds the 4th Rank.