With 10E variation the initial indication when on 090(T) will be 080(M)
Earth rate wander in degrees per hour = -15 x Sin Lat
45 minutes = 0.75 hours so total Earth Rate wander over this period
is -15 x Lat 62 x 0.75 = -9.933 degrees
Transport Wander rate in degrees per hour = E to W groundspeed x Tan latitude /60
When flying W to E the groundspeed is considered negative
So over a period of 45 minutes
transport wander = -545 x Tan 62 x 0.75 / 60 = -12.812 degrees.
Total wander = -9.933 ER + -12.812 TW = -22.745
Final heading indication = initial indication + total wander
Final heading indication = 080 - 22.812 = 57.255 degrees
The closest option is 57.3 degrees.