Which one among the following statements is not correct?

• A

  Gandhara Schood of Art owed its origin to the IndoGreek rulers but the real patrons of the school were the Kushans, especially Kanishka
• Correct answer
  B

  Rich carving, elaborate ornamentations and complex symbolism were not the main features of the Gandhara sculpture
• C

  The Graeco-roman architectural impact modified the structure of Buddhist Stupas
• D

  The artists of the Amravati School of Arts mainly used white marble

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