The correct options are
A The initial three storeys were completed by Firoz Shah Tughlaq.
B The last two storeys were added by Iltutmish.
C The height of the minar is 63 metres.
Qutub-ud-Din Aibak envisioned Qutub Minar, but he only got to complete the basement. The initial three storeys were completed by Iltutmish. The last two storeys were added by Firoz Shah Tughlaq. The height of the minar is 73 metres. The diameter of the minar at the top is around 3 metres. The complete structure is made of red sandstone, marble and grey quartzite.