Objective: Arrange four Rajput rulers chronologically by their reign periods.
Procedure: Identify the reign dates for each ruler to determine the correct sequence.
Ruler Reign Periods:
(B) Raja Bharmal: Kachwaha ruler of Amber, 1548-1574 (contemporary of Akbar).
(D) Aniruddha Singh: Hada ruler of Bundi, 1682-1695.
(A) Sawai Ishwari Singh: Kachwaha ruler of Jaipur, 1743-1750.
(C) Madho Singh I: Kachwaha ruler of Jaipur, 1750-1768 (succeeded Ishwari Singh).
Chronological order: Raja Bharmal (16th century) $\rightarrow$ Aniruddha Singh (late 17th century) $\rightarrow$ Sawai Ishwari Singh (mid-18th century) $\rightarrow$ Madho Singh I (mid-18th century).
Conclusion: The correct chronological order of rulers is (B), (D), (A), (C).