Miller synthesized simple amino acids from one of the following mixtures in an experiment:
Stanley Miller was an American chemist, conducted one of the most exciting experiments in modern science. He hypothesised that stated life could have originated from basic molecules present on the early Earth. He included basic chemicals that were present on Earth before life began: water, methane, ammonia, and hydrogen. These molecules contain the most abundant elements in living cells, which are carbon, hydrogen, oxygen, and nitrogen. It leads to the formation of simple amino acids.
So, the correct option is ‘CH4, NH3, H2(2:1:2) and water vapour’.