Consider a mercury-filled tube as shown in the figure below 

Which of the following options about the pressures at the lettered locations $(A, B, C, D)$ is true?

210958-q

  • [KVPY 2021]
  • A

    $P _{ B } > P _{ A } > P _{ C } > P _{ D }$

  • B

    $P _{ B }= P _{ C }= P _{ D } > P _{ A }$

  • C

    $P_B = P_C = P_D < P_A$

  • D

    $P_A = P_B = P_C = P_D$

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