Which of the following features of Jami Mosque of Gulbarga are correct?(a) The Indian and Iranian elements are so intertwined in it as to be indistinguishable(b) The whole structure is a vast pillared hall covered by a roof(c) There is open courtyard in it(d) The entire roof is covered by small domes arranged in seven rows.Select the correct option:

• A. (c) and (d) only
• B. (b) and (c) only
• C. (a), (b) and (d) only
• D. (a) and (d) only