Why does Hex not read out in an array for LED "clock"?

Using Arduino Programming Questions
15

Which bit of 'B0011' corresponds to say pin 9. Bits are numbered with 0 on the right thru 3 on the left just the right side of the 'B'

int pins[] = {9,10,11,12};	// an array of pin numbers
int pinCount = 4;
int data[] = {B0000,B0001,B0010,B0011};  // array of data