മോണ്ട്രിയൽ ഉടമ്പടി ഒപ്പുവച്ച വർഷം ഏത് ?
A1987
B1997
C1992
D1981
A1987
B1997
C1992
D1981
Related Questions:
Find out the correct explanation
Nimbus clouds are :
i.Dark clouds seen in lower atmosphere
ii.Feather like clouds in the upper atmosphere in clear weather.