Consider the following four statements A, B, C and D and select the right option for two correct statement :-
Statements :-
(A) RNA was first genetic material
(B) 5-methyl uracil found in RNA
(C) DNA polymerase-III does not require RNA primer for the synthesis of DNA strand
(D) RNA primer formed over 3'end of template strand The correct statements are :-

Options

A. (A) and (B)
B. (B) and (C)
C. (A) and (D)
D. (A) and (C)

Answer

To determine the two correct statements among A, B, C, and D, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement A: RNA was the first genetic material.**
- This statement is correct. According to scientific consensus, RNA is believed to have been the first genetic material in early life forms before DNA evolved. RNA can store genetic information and catalyze chemical reactions, making it a suitable candidate for the first genetic material.

2. **Statement B: 5-methyl uracil found in RNA.**
- This statement is incorrect. The term "5-methyl uracil" refers to thymine, which is found in DNA, not RNA. In RNA, uracil replaces thymine, so this statement is false.

3. **Statement C: DNA polymerase-III does not require RNA primer for the synthesis of DNA strand.**
- This statement is incorrect. DNA polymerase III requires an RNA primer to initiate DNA synthesis. It cannot start synthesizing DNA from scratch; it needs a primer to provide a free 3' hydroxyl group.

4. **Statement D: RNA primer formed over 3' end of template strand.**
- This statement is correct. During DNA replication, the RNA primer is synthesized complementary to the template strand and is indeed formed at the 3' end of the template strand, allowing DNA polymerase to extend the new DNA strand.

### Conclusion:
The correct statements are:
- **Statement A:** RNA was the first genetic material. (Correct)
- **Statement D:** RNA primer formed over 3' end of template strand. (Correct)

Thus, the correct option is **A and D**.