The correct options are
C To simply know how many genes are present in human genome
D To ratify if the estimate of 150,000 human genes was indeed correct
One of the primary objectives of HGP was to get a rough estimate of what the human genome consists of. For this, it was imperative to have the correct estimate of the number of genes present in the human genome. Today the estimate of human gene stands between 20,000 to 25,000.