Option (1) is incorrect: Section 17 of the Limitation Act takes within its ambit concealments, fraud and mistakes.
Option (2) is incorrect: Section 17 of the Limitation Act takes within its ambit concealments, fraud and mistakes.
Option (3) is incorrect: Section 17 of the Limitation Act takes within its ambit concealments, fraud and mistakes.
Option (4) is correct: Section 17 of the Limitation Act takes within its ambit concealments, fraud and mistakes.