$A$ beam of light propagating in medium $A$ with index of refraction $n(A)$ passes across an interface into medium $B$ with index of refraction $n(B)$. The angle of incidence is greater than the angle of refraction; $v(A)$ and $v(B)$ denote the speed of light in $A$ and $B$. Then which of the following is true?

• A
  $v(A) > v(B)$ and $n(A) > n(B)$
• B
  $v(A) > v(B)$ and $n(A) < n(B)$
• C
  $v(A) < v(B)$ and $n(A) > n(B)$
• D
  $v(A) < v(B)$ and $n(A) < n(B)$