What is the 4 digit number whose second digit is thrice the first digit and 3rd digit is sum of 1st and 2nd and last digit is thrice the second digit.	Choose the correct answer.
A) 2674	B) 1349	C) 3343	D) 3678	E) 3679

Rationale: let four digits is a , b , c & d . . . so by given b is 3 a c is 4 a d is 9 a so ans is 1349 answer : b
Answer: B