Living world’s existence depends on enzymes and on information systems capable of carrying and maintaining the blueprint for these enzymes and capable of self replication and transmission of blueprint generation after generation. Discovery of RNA enzymes, ribozymes, that can catalyze specific reactions and at the same time serve as genetic material led to the existence of “RNA world”. According to “RNA world” hypothesis, a self-replicating RNA or a polymer with similar chemical characteristics might serve as parent of all life on this planet as it has ability reproduce itself across the generations from the origin of life to the present. Correct option is C. Different types of RNAs, namely mRNA, rRNA and tRNA, do not fulfil both requirements of serving as catalyst and genetic material at the same time. Correct answer is C.