The average age of a family of $6 \,members\, 4 \,year$ ago was $25 \,years.$ Mean while a child was born in this family and still the average age of the whole family is same today. The present age of the child is in $years$ $?$

  • A

    $2$

  • B

    $1.5$

  • C

    $1$

  • D

    $3$

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