The number of different bond angles for the most polar isomer of Pbr2F3 is?

A. 7

B. 6

C. 5

D. 8

The number of different bond angles is 6 and here you have the different angles:

Br (ax) - P-Br (eq) ... greater than 90 degrees (axial to equatorial)

Br (eq) - P-F (ax) ... greater than 90 degrees (equatorial to axial)

Br (ax) - P-F (eq) ... less than 90 degrees (axial to equatorial)

F (ax) - P-F (eq) ... less than 90 degrees (axial to equatorial)

F (eq) - P-F (eq) ... less than 120 degree (equatorial)

Br (eq) - P-F (eq) ... greater than 120 degrees (equatorial)