Answers:
(1) Yes. He can remain present.
(2) This is a question of fact. What happened in an individual case can be explained in absolute terms.
(3) Accused can cross-examine the witnesses of the prosecution. If the accused has engaged a lawyer, then his lawyer does the cross-examination. This is written in the Evidence Act itself.
(4) Accused cannot be compelled to answer the questions under Section 313 Cr.P.C. In fact, sub-section (3) of Section 313 itself makes it clear. So, he is free to answer or not to answer. But, the silence of accused may sometimes be considered as an adverse circumstance in respect of that question.
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