Paragraph: The figure shows a surface $X Y$ separating two transparent media, medium-1 and medium-2. The lines $a b$ and $c d$ represent wavefronts of a light wave travelling in medium-1 and incident on $X Y$. The lines ef and $g h$ represent wavefronts of the light wave in medium-2 after refraction.
Question: Light travels as a

• Correct answer
  A

  parallel beam in each medium
• B

  convergent beam in each medium
• C

  divergent beam in each medium
• D

  divergent beam in one medium and convergent beam in the other medium

Hence, the correct answer is option: 'A'.