Match the following. 
A a -(ii), b-(iii), c -(iv), d-(i)
B a -(i), b-(ii), c-(iv), d -(iii)
C a -(iv), b-(i), c-(ii), d -(iii)
D a -(iii), b -(iv), c-(i), d-(ii)
what does this question mean?
what does this question mean?