A girl was asked to multiply a certain number by 43. She multiplied it by 34 and got his answer less than the correct one by 1233. Find the number to be multiplied.  Choose the correct choice from the following:
A) 130  B) 132  C) 134  D) 137  E) 138

Rationale: "let the required number be x . then , 43 x – 34 x = 1233 or 9 x = 1233 or x = 137 . required number = 137 . answer : d"
Answer: D