The aircraft OBI has a CRS of 200°, displaying TO and RIGHT TURN indications.

The TO indication places it relative to the reciprocal of 200° = 020°.

On a 2 dot HSI, a Right Turn by 1x dot (=5°) when going TO the beacon places it to the left of the 020° radial = 025° radial.

The reciprocal of 025°  FROM the beacon, ie. the QDM, = 205°.

The QDM to the beacon = 205° M and the RMI always indcates QDM at the head of the needle.

The aircraft is on a heading of 210° M, therefore for Relative Bearing.

HDG + RB = QDM

RB = QDM - HDG

RB = 205° - 210°

RB = -005° (+360° = 355°)

The only RMI indicating a QDM of 205° is B, which also shows a Relative Bearing of 355°.