If the average of the ages of Rakesh and Mohan is $15,$ average of the ages of Mohan and Ramesh is $12$ and the average of the ages of Rakesh and Ramesh is $13,$ then the age of Mohan, is?

  • A

    $16$

  • B

    $13$

  • C

    $14$

  • D

    $12$

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