Step 1: Concept
The plays of Post-Independence India reflect the socio-political changes and cultural dynamics of the period. Notable playwrights include Mannu Bhandari, Girish Karnad, Swadesh Deepak, Dharmveer Bharti, and Mohan Rakesh.
Step 2: Meaning
This question tests knowledge about specific plays by these authors and their themes.
Step 3: Analysis
A) Mannu Bhandari composed 'Mahabhoj (Great Banquet)', which indeed revolves around the murder of a young activist. This statement is correct.
B) Girish Karnad's 'Tughlaq' does present the tragedy of a quixotic, pragmatic ruler growing unsuccessful and lonely. This statement is also correct.
C) Swadesh Deepak directed the play 'Ghasiram Kotwal'. However, this information pertains to direction rather than authorship or composition, making it incorrect for this context.
D) Dharmveer Bharti's 'Andha Yug' is based on the epic Mahabharata. This statement is correct as 'Andha Yug' is a well-known play by Dharmveer Bharti that draws from the Mahabharata.
E) Mohan Rakesh's 'Ashadh Ka Ek Din' captures the timeless love story of Kalidas, but it actually deals with social and political issues rather than a love story. This statement is incorrect.
Step 4: Conclusion
The correct statements are A (about Mannu Bhandari), B (about Girish Karnad), and D (about Dharmveer Bharti).
Final Answer: (B)