Correct Answer - Option 1 : S30°E
Concept:
Magnetic declination: At any place horizontal angle between true meridian and magnetic meridian is called magnetic declination.
For Eastern Declination:
α = β + θe or T.B = M.B + θe
Here, α = True bearing (T.B)
β = Magnetic bearing (M.B), and
θE = Eastern declination
For Western Declination:
α = β – θw or T.B = M.B – θw
Here, θw = western declination.
Calculation:
Magnetic bearing of a line AB = S25°00’E = 155°00’
Declination = 5°00’ West
∴ True bearing = 155°00’ - 5°00’ = 150° = S30°00’E