Explanation:

- Against her will: This means the act was done without the voluntary agreement of the woman, as per her conscious and deliberate choice.

- Without her consent: This implies that the woman did not give permission for the act to occur. Her consent must be clear and voluntary.

- Both (a) and (b): This option suggests that for an act to be considered rape, it must be against the woman's will and without her consent.

- None of the above: This indicates that neither being against her will nor without her consent is an essential ingredient of the offence, which is incorrect.

Correct Answer: Both (a) and (b)