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(B) In statement $(b)$, the percentage error for $1 \ m$ length is $\frac{0.01}{1} 	imes 100 = 1 \%$. For $0.5 \ m$ length, the percentage error is $

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Length of $1 \ m$ and $0.5 \ m$ have been both measured with the same absolute error of $0.01 \ m$. Both the measurements are equally accurate.

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(B) In statement $(b)$, the percentage error for $1 \ m$ length is $\frac{0.01}{1} 	imes 100 = 1 \%$. For $0.5 \ m$ length, the percentage error is $\frac{0.01}{0.5} 	imes 100 = 2 \%$. Since the percentage error is different, the measurements are not equally accurate. Thus, statement $(b)$ is incorrect. In statement $(c)$, the number of significant digits in $1.6$ is $2$ and in $0.60$ is $2$ (leading zeros are not significant). Thus, statement $(c)$ is incorrect. In statement $(d)$, according to rounding rules, if the digit to be dropped is $5$, the preceding digit remains unchanged if even. Thus, $2.445$ rounded to two decimal places is $2.44$. Thus, statement $(d)$ is incorrect. Note: This question contains multiple incorrect statements $(b, c, d)$.

$A$. Entropy	$I$. Angular velocity
$B$. Young's modulus of elasticity	$II$. Boltzmann constant
$C$. Angular momentum	$III$. Energy density
$D$. Decay constant	$IV$. Planck's constant

List $I$ (Physical Quantity)	List $II$ (Dimensional Formula)
$(A)$ Pressure gradient	$(I)$ $[M^0 L^2 T^{-2}]$
$(B)$ Energy density	$(II)$ $[M^1 L^{-1} T^{-2}]$
$(C)$ Electric Field	$(III)$ $[M^1 L^{-2} T^{-2}]$
$(D)$ Latent heat	$(IV)$ $[M^1 L^1 T^{-3} A^{-1}]$

Identify the incorrect statement among the following.

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