In this task, you need to answer the given multiple-choice question on geometry. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Input: Consider Input: Problem: the ratio between the perimeter and the width of a rectangle is 5 : 1 . if the area of the rectangle is 294 sq . cm , what is the length of the rectangle ? 
Options: a ) 15 cm , b ) 18 cm , c ) 21 cm , d ) 24 cm , e ) 27 cm

Output: c


Input: Consider Input: Problem: the diagonals of a rhombus are 10 cm and 12 cm . find its area ? 
Options: a ) 158 , b ) 60 , c ) 150 , d ) 123 , e ) 117

Output: b


Input: Consider Input: Problem: find the volume , curved surface area and the total surface area of a cylinder with diameter of base 7 cm and height 40 cm . 
Options: ['a ) 952 cm ^ 2', 'b ) 957 cm ^ 2', 'c ) 954 cm ^ 2', 'd ) 958 cm ^ 2', 'e ) none of them']


Output: b