Match the following. (Take the relative strength of the strongest fundamental forces in nature as $1$)

  • A
    $A-f, B-i, C-e, D-h$
  • B
    $A-f, B-h, C-e, D-g$
  • C
    $A-f, B-h, C-e, D-i$
  • D
    $A-f, B-e, C-h, D-i$

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$Joule-second$ is the unit of

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$(a)$ The energy required to break one bond in $DNA$ in $eV$.
$(b)$ The kinetic energy of an air molecule $(10^{-21} \; J)$ in $eV$.
$(c)$ The daily intake of a human adult in kilocalories.

The density of a material in $CGS$ system of units is $4 \, g \, cm^{-3}$. In a system of units in which the unit of length is $10 \, cm$ and the unit of mass is $100 \, g$,the value of the density of the material will be:

Which of the following pairs does not have similar dimensions?

$Assertion$: In the measurement of physical quantities,direct and indirect methods are used.
$Reason$: The accuracy and precision of measuring instruments,along with errors in measurements,should be taken into account while expressing the result.

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