Step 1: Understanding the Concept: 
The question requires arranging figures from the Mughal dynasty in their correct chronological order based on their time of reign or prominence. 
 
Step 3: Detailed Explanation: 
The sequence is based on the line of succession in the Mughal Empire: 
(B) Akbar: The third Mughal Emperor, who reigned from 1556 to 1605. 
(D) Jahangir: Akbar's son and successor. He was the fourth Mughal Emperor and reigned from 1605 to 1627. 
(C) Prince Khurram: The son of Jahangir. He later ascended the throne as the fifth Mughal Emperor, Shah Jahan, and reigned from 1628 to 1658. 
(A) Dara Shikoh: The eldest son of Shah Jahan (Prince Khurram). He was a prominent prince during his father's reign and a key figure in the war of succession but was executed in 1659 and never became emperor. 
The correct order based on their lives and periods of influence is Akbar $\rightarrow$ Jahangir $\rightarrow$ Prince Khurram $\rightarrow$ Dara Shikoh. This corresponds to the sequence (B), (D), (C), (A). 
 
Step 4: Final Answer: 
The correct chronological order of the Mughal figures is (B) Akbar, (D) Jahangir, (C) Prince Khurram, (A) Dara Shikoh. 
Rearrange the following parts to form a meaningful and grammatically correct sentence: 
P. a healthy diet and regular exercise 
Q. are important habits 
R. that help maintain good physical and mental health 
S. especially in today's busy world