Given below are two statements: One is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A:$ For measuring the potential difference across a resistance of $600\,\Omega$,the voltmeter with resistance $1000\,\Omega$ will be preferred over a voltmeter with resistance $4000\,\Omega$.
Reason $R:$ $A$ voltmeter with higher resistance will draw smaller current than a voltmeter with lower resistance.
In the light of the above statements,choose the most appropriate answer from the options given below.

• A
  $A$ is not correct but $R$ is correct
• B
  Both $A$ and $R$ are correct and $R$ is the correct explanation of $A$
• C
  Both $A$ and $R$ are correct but $R$ is not the correct explanation of $A$
• D
  $A$ is correct but $R$ is not correct