6/7 — 1/6 =

A: 43/42
B: 29/42
C: 5/42
D: 17/42

To solve this equation, we need to find a common denominator.

The common denominator of 7 and 6 is 42.

Now we can rewrite the equation as:

(6/7)*(6/6) - (1/6)*(7/7) = 36/42 - 7/42

= (36 - 7)/42

= 29/42

Therefore, the answer is option B: 29/42