Explanation:

- Section 17: Deals with the exclusion of time in cases where fraud has occurred.

- It states that the limitation period does not begin until the party affected by fraud discovers it.

- This is based on the principle that ignorance of the fraud should not affect the rights of the defrauded party.

- Section 18: Relates to the acknowledgment in writing of a debt or right.

- Written acknowledgment before the expiration of the limitation period can extend the period.

- Section 19: Covers the effect of payment on account of a debt or of interest on legacy.

- Part payment can extend the limitation period, resetting it from the date of payment.

- Section 20: Involves suits relating to trusts and trust property.

- It provides certain exceptions and applications to limitation rules in cases of fiduciary relationships.