Two masses A and B are connected with two inextensible string to write constraint relation between ${\mathrm{v}}_{\mathrm{A}}$ and ${\mathrm{v}}_{\mathrm{B}}$
Student A:${\mathrm{v}}_{\mathrm{A}}\cos \theta ={\mathrm{v}}_{\mathrm{B}}$
Student B: ${\mathrm{v}}_{\mathrm{B}}\cos \theta ={\mathrm{v}}_{\mathrm{A}}$

• A

  A is correct, B is wrong 

• B

  B is correct, A is wrong 

• C

  Both are correct

• D

  Both are wrong