MCQ
Sickle cell-anaemia disorder arises due to
- ADuplication of a segment of $DNA$
- ✓Substitution in a single base of $DNA$
- CDeletion of a segment of $DNA$
- DDuplication in a base pair of $RNA$

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Match List $I$ with List $II$.
| List $I$ | List $II$ |
| $A$. Vasectomy | $I$. Oral method |
| $B$. Coitus interruptus | $II$. Barrier method |
| $C$. Cervical caps | $III$. Surgical method |
| $D$. Saheli | $IV$. Natural method |
Choose the correct answer from the options given below: