On a map the distance between two mountains is 312 inches. The actual distance between the mountains is 136 km. Ram is camped at a location that on the map is 28 inch from the base of the mountain. How many km is he from the base of the mountain?  Choose the correct choice from the following:
A) 14.83
B) 12.2
C) 14.8
D) 14.82
E) 14.12

Rationale: "explanation : since 312 inch = 136 km so 1 inch = 136 / 312 km so 28 inch = ( 136 ã — 28 ) / 312 = 12.2 km answer : b"
Answer: B