In silicon dioxide

• Correct answer
  A

  Each silicon atom is surrounded by four oxygen atoms and each oxygen atom is bonded to two silicon atoms
• B

  Each silicon atom is surrounded by two oxygen atoms and each oxygen atom is bonded to two silicon atoms
• C

  Silicon atoms is bonded to two oxygen atoms
• D

  There are double bonds between silicon and oxygen atoms

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