Option (1) is incorrect: Section 76 and 79 of the IPC provide the general exception of mistake of fact, not mistake of law.
Option (2) is correct: Section 76 and 79 of the IPC provide the general exception of mistake of fact.
Option (3) is incorrect: Section 76 and 79 of the IPC provide the general exception of mistake of fact, not mistake of law.
Option (4) is incorrect: Section 76 and 79 of the IPC provide the general exception of mistake of fact, not mistake of law.