MCQ
Select the correct option w.r.t. $Age$ pyramids.


- ✓$a$ - Expanding, $b$ - stable, $c$ - Declining
- B$a$ - stable, $b$ - Expanding,$c$ - Declining
- C$a$ - stable, $b$ - Declining, $c$ - Expanding
- D$a$ - Declining, $b$ - stable, $c$ - Expanding

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
| List $I$ | List $II$ |
| $A$. Frederick Griffith | $I$. Genetic code |
| $B$. Francois Jacob and Jacque Monod | $II$. Semi-conservative mode of DNA replication |
| $C$. Har Gobind Khorana | $III$. Transformation |
| $D$. Meselson and Stahl | $IV$. Lac operon |
Choose the correct answer from the options given below: