The answer is a. You have the correct one highlighted I believe. 
Hope this helps.
 
        
                    
             
        
        
        
A₅ = 1/16  and r= 1/4
Let see how to build up this formula that is going to give that term of rank n
1st term =a₁ = To be calculated
1st a₁   = a₁  x  r°
2nd a₂  = a₁  x  r¹ 
3rd a₃  =  a₁  x  r²
4th a₄   = a₁  x  r³ 
5th a₅   = a₁  x  r⁴
.......................
.......................
nth : a(n) = a₁  x r⁽ⁿ-¹)
Note when that the subscript of a is the same as the exponent mines 1
We know the ratio r =1/4 & the fifth term, a₅ =1/16 (given). Now let's apply the formula to calculate the unknown a₁.
a(n) = a₁  x r⁽ⁿ-¹) ==>a₅ = a₁ x (1/4)⁽⁵⁺¹⁾ ===> 1/16 = a₁ x (1/4)⁴
1/167 = a₁ (1/256) ==> a₁ =16 & the formula becomes
a₅ = 16(1/4)⁴ 
        
                    
             
        
        
        
9 1/2 = 19/2
(29/5) / (19/2) 
When changing division to multiplication, flip the number (right hand side).
(29/5) * (2/19)
58/95