The features like easy learning and rich set of libraries are witnessed in the programming language called
a. Prolog
b. Lisp
c. Julia
d. Scilab

The correct answer is Option B (d only).

Key Points:
• Passage Reference: Paragraph 3 states: *"Scilab is an excellent tool for developing AI and machine learning-based applications due to its ease of learning and rich set of libraries."*
• Explanation: The passage directly associates 'ease of learning' and 'rich set of libraries' with 'Scilab' (statement 'd').
• Option Match: Statement 'd' ('Scilab') is given in Option 2 ('d only').
• Official Key: Option 2 is the official answer declared in MPSC Final Answer Key.
• Key Takeaway: Remember: 'Scilab' is highlighted in the passage for its ease of learning and rich set of libraries.