If A and D are separated by exactly one note, which of the following must be true?

Directions: Study the following information carefully and answer the question that follows:

A certain musical scale consists of exactly six notes: A, B, C, D, E and F. The notes are arranged from the lowest to the highest (starting from 1st note to 6th note of the scale). Each note has to appear once in the scale.

1. E is lower than F.

2. B is higher than A.

3. D is somewhere in between A and B.

4. No note is above C.

C is the highest note given. If A and D are separated by one note and B must be a higher note than A and D, then the arrangement will be as follows: 6^th note : C 5^th note : B

Case 1: As there is exactly one note between A and D and E is lower than F, so 4^th note must be D, 3^rd note must be F, 2^nd note must be A and 1^st note must be E.

Case 2: If we place D on the 3^rd note, A must be placed on the 1^st note. As E is lower than F, then 4^th and 2^nd notes must be F and E, respectively.

In both the cases, E is lower than D. So, this is the correct answer.