Step 1: Understanding the Concept: 
The question asks to identify a specific mural located on an outer wall of Kala Bhavana, the fine arts faculty of Visva-Bharati University in Shantiniketan, which is renowned for its significant contributions to modern Indian art, including several important public murals. 
Step 2: Detailed Explanation: 
The outer walls of Kala Bhavana feature several important murals by eminent artists. The work referred to in the question is a sand-cast cement mural on the facade of a studio building created by the master artist K.G. Subramanyan. This mural was completed in December 1988.
Its subject matter is the depiction of three mythological goddesses: Durga, Manasa, and Kamala Kamini. This work is distinct from Subramanyan's more widely known black-and-white mural at the same location, which was created later. Therefore, the title and year in option 4 accurately describe this specific artwork. 
Step 3: Final Answer: 
The mural done on the outer wall of the Kala Bhavana, Shantiniketan is titled 'Three mythological goddesses' and was completed in 1988.
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