Which of the following statement is/are correct for prophase of mitosis ?_ans_key_(i) At the end of this phase nuclear membrane and nucleolus disintegrate._ans_key_(ii) At the end of this phase two chromosome and a centromere holding them together._ans_key_(iii) This phase begins with the condensation of chromatids along their lengths.

• A. (i) only
• B. only (i) and (ii)
• C. only (ii) and (iii)
• D. (i) and (iii)