What is present in place of $Thymine$ in $RNA$?

Which of the following is not a type of $RNA$?

How many main types of $RNA$ are there?

Which structure of $RNA$ resembles a cloverleaf?

Which biological molecule acts as an adapter,structural,and in some cases,a catalytic molecule?

Which of the following statements is false for $RNA$?
$(i)$ $RNA$ can directly code for the synthesis of proteins
$(ii)$ It is a very common process to synthesize $DNA$ from $RNA$
$(iii)$ $RNA$ is used as genetic material only in humans
$(iv)$ One polynucleotide chain is present in $RNA$