The occurrence of auroral displays is closely correlated with :
(1) Snow cover
(2) Solar-flare activity
(3) Earth’s magnetic poles
(4) Coriolis force
1
(1), (3) and (4)
2
(2) and (3)
3
(2) and (4)
4
(1), (2) and (4)
5
Question Not Attempted
The occurrence of auroral displays is closely correlated with :
(1) Snow cover
(2) Solar-flare activity
(3) Earth’s magnetic poles
(4) Coriolis force