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.
Statement $I$: Mitochondria and chloroplasts both double membranes bound organelles.
Statement $II$: Inner membrane of mitochondria is relatively less permeable, as compared chloroplast.
In the light of the above statements, choose the mis appropriate answer from the options given below:
$R$ : Total biomass of a tree in a specific area is more than that of herbivores.
$X$ $-$ $Y$