I am male.why my younger sister is taller than me?

i am 24 years old Male. my younger sister is 17 years old.
but she is teller than me. my heaight 5 feet 7 inches.
but her heaight is 5 feet 11 inches. someone says she is like my elder sister. i feel sad. any way to beat her heaight. place help me..
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