The number of 3 -digit numbers such that the digit 1 is never to the immediate right of 2 is

(A) 781

(B) 791

(C) 881

(D) 891

The number of 3 -digit numbers such that the digit 1 is never to the immediate right of 2 is

(A) 781

(B) 791

(C) 881

(D) 891

127