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1970s
1950s
1980s
1960s
In which decade was the telephone invented?
In which form the chemical compound RDX is used?
In which of the following diseases copper accumulates in tissues ?
In which of the following era began the Self replicating RNA molecules on Earth ?
In which of the following processes, the heat is fully converted into work?
In winter season, water coming out from hand pumps is Hot because-
Instrument used to study the behaviour of a vibrating string is:
Insulin was discovered by
Intensity of sound has
Interveinal necrotic spots on leaves appear due to