question_answer

How many 4s in the sequence given below are followed by' and preceded by I? \[\begin{align}   & 8\text{  }4\text{  }7\text{  }2\text{  }1\text{  }7\text{  }4\text{  }1\text{  }4\text{  }7\text{  }1\text{  }4\text{  }7\text{  }6\text{  }7 \\  & 1\text{  }4\text{  }1\text{  }4\text{  }7\text{  }4\text{  }7\text{  }1\text{  }4\text{  }7\text{  }2\text{  }9\text{  }4\text{  }1\text{  }7 \\ \end{align}\]

A) 4                     

B) 5

C) 6                                 

D) None of these