Total internal reflection of a ray of light is possible when the ($i_c$ = critical angle,$i$ = angle of incidence)

• A
  Ray goes from denser medium to rarer medium and $i < i_c$
• B
  Ray goes from denser medium to rarer medium and $i > i_c$
• C
  Ray goes from rarer medium to denser medium and $i > i_c$
• D
  Ray goes from rarer medium to denser medium and $i < i_c$