Statement 1 --> Not sufficient because b can be 4938 or any multiple of 4938. Therefore, b has got multiple values and therefore this statement is insufficient.
Statement 2--> f = 6 so e can be 7 or 8 Therefore insufficient.
Statement 1 & 2 together are insufficient. So my answer is E. But the book says its B as they say c=3, d = 4, e =5. But my question is stem doesn't say they are consecutive integers so it can't be? Guys - am I reading something wrong over here? can you please help?