Which among the following is a requisite before an accused may be discharged to become a state witness?

The question

Which among the following is a requisite before an accused may be discharged to become a state witness?

1. A.The testimony of the accused sought to be discharged can be substantially corroborated on all points.
2. B.The accused does not appear to be guilty.
3. C.There is absolute necessity for the testimony of the accused whose discharge is requested.
4. D.The accused has not at any time been convicted of any offense. (E) None of the above.

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