Answer:
T,U.
Step-by-step explanation:
DNA and RNA both are the genetic material of the living organism. DNA is the genetic material in the living organism whereas RNA is the genetic material of some virus only. DNA and RNA shows considerable difference in their structure.
The most important difference between the DNA and RNA molecule is the presence of nitrogenous bases. The nitrogenous base of DNA is adenine, guanine, thymine (T) and cytosine. The RNA contains adenine (A), guanine (G), cytosine (C) and Uracil (U) instead of thymine. The DNA contain deoxyribose sugar and RNA contains oxyribose sugar.
Thus, the correct answer is option (a).