App Logo

No.1 PSC Learning App

1M+ Downloads

Ozone layer was discovered in?

A1920

B1913

C1912

D1915

Answer:

B. 1913

Read Explanation:


Related Questions:

' Hiroshima in Chemical Industry ' എന്ന ഭോപ്പാൽ ദുരന്തത്തെ വിശേഷിപ്പിച്ച സംഘടന ഏതാണ് ?

The Kyoto agreement came into force on?

Layer of atmosphere in which 90% of Ozone layer lies is?

The Chernobyl nuclear incident happened in Russia in the year of?

Chalk river nuclear reactor accident happened on?