Step 1: Understanding IPC provisions.
- Sections 76 and 79 of the IPC provide general exceptions for acts done under a mistake of fact, in good faith, believing them to be bound or justified by law.
- Section 77 IPC protects judges acting judicially under lawful authority.
Step 2: Why all statements are correct in law, hence the option “all incorrect” is wrong.
- (a) Matches Section 76 IPC.
- (b) Matches Section 77 IPC.
- (c) Matches Section 79 IPC.
Thus, these statements are legally accurate and not “incorrect”. Choosing (d) marks them all as wrong, which is itself incorrect, hence the question’s correct answer is (d) as the “incorrect” choice.
\[
\boxed{(d)}
\]