Select the correct option :
(a) The Earth Summit (i) Nanda Devi
(b) Alien species (ii) Silent Valley
( c ) National park (iii) Rio de janeiro
(d) Biosphere Reserve (iv) Nile Perch in Lake Victoria
A. `{:(,a,b,c,d),(,iii,iv,ii,i):}`
B. `{:(,a,b,c,d),(,ii,i,iv,iii):}`
C. `{:(,a,b,c,d),(,i,iv,iii,ii):}`
D. `{:(,a,b,c,d),(,iii,iv,i,ii):}`
