Select the incorrect statement.
- ABone and cartilage are specialized connective tissue.
- BSkull,vertebral column,ribs and sternum all together constitute the axial skeleton.
- CCranial bones are $12$ in number.
- DHyoid bone is present at the base of the buccal cavity.
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$\frac{d}{d x}\left[a \tan ^{-1} x+b \log \left(\frac{x-1}{x+1}\right)\right]=\frac{1}{x^4-1}$
$\Rightarrow a-2 b$ is equal to
$\Rightarrow a-2 b$ is equal to
Match the following lists:
List-$I$ List-$II$ $A$. Ethane $1$. $2$ $sp$ carbons $B$. Ethylene $2$. $6$ $sp^2$ carbons $C$. Acetylene $3$. $2$ $sp^3$ carbons $D$. Benzene $4$. $2$ $sp^2$ carbons $5$. $1$ $sp$ and $1$ $sp^2$ carbons
| List-$I$ | List-$II$ |
| $A$. Ethane | $1$. $2$ $sp$ carbons |
| $B$. Ethylene | $2$. $6$ $sp^2$ carbons |
| $C$. Acetylene | $3$. $2$ $sp^3$ carbons |
| $D$. Benzene | $4$. $2$ $sp^2$ carbons |
| $5$. $1$ $sp$ and $1$ $sp^2$ carbons |
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