os fork self doubt

Question

https://gateoverflow.in/765/gate2005-72w

while answering this question how we are concluding that we need to take logical address part not physical address part???? 

Comments

they did wrong... physical address also change

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@ Shaik Masthan  ACTUALLY I AM ASKING FOR ANSWERING ABOUT ADDRESS WE NEED TO ANSWER WITH RESPECT TO LOGICAL ADDRESS OR WITH RESPECT TO PHYSICAL ADDRESS i,e v and y are physical address or logical address becz if we will consider thenm as logical address then answer is c and if we are considering them as physical address the answer will be d....so how to conclude  about  which address they asked??

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printing in the order a and &a

Given that u,v be the values printed by the parent process ====> u is value and v is address

Given that x,y be the values printed by the child process ====> x is value and y is address

therefore at any cost v != y should be true, x=u+10 is true

Option D is right