​Four girls, Radha, Neena, Mohita and Jyoti, are to be served in a sequence by a service provider. However, there are some limitations as follows: Mohita and Jyoti cannot be served one after the other; Neena cannot be served at the third number in sequence; and Radha and Neena are to be served one after the other. Considering the given information, which of the following statements is compulsorily true?

They must have at least one person between them in the sequence.

The third position is not available for Neena.

They must always appear consecutively in the sequence (either Radha followed by Neena or Neena followed by Radha).

Since Radha and Neena must be served consecutively, and Neena cannot be in the third position, Radha must be in the third position. This ensures that Neena can occupy the second or fourth position while staying consecutive to Radha.

Mohita cannot immediately follow or precede Jyoti. This means Mohita and Jyoti must have either Radha or Neena separating them in the sequence.

This is not necessarily true because there are no constraints preventing Mohita from being served first.

This is not necessarily true because Mohita’s position depends on the other constraints.

This is compulsorily true, as derived above.

This is not necessarily true, as there are no constraints forcing Jyoti to be first.