भारत सरकारने स्वीकारलेल्या सार्वजनिक वितरण व्यवस्थेची मुख्य वैशिष्ट्ये खालीलप्रमाणे आहेत : (a) बाल विकास (b) दुहेरी किंमत (c) केंद्र राज्य नियंत्रण (d) परकीय व्यापार वरीलपैकी कोणते/ती विधान/ने अयोग्य आहे/त ?

The correct answer is Option D ((a) and (d)).

Key Points:
• Correct Option Evaluation: The correct answer is option (4) (a) and (d).
• Features of Public Distribution System (PDS):
• The question asks which of the listed features are incorrect (अयोग्य) regarding PDS:
• (a) Child development: Child development is handled by ICDS (Anganwadis), not a direct operational feature of PDS. (Incorrect feature)
• (b) Dual prices: PDS features dual pricing (APL/BPL or subsidized vs. open market pricing). (Correct feature)
• (c) Centre-state control: Joint responsibility where the Centre procures, stores, and transports grains, while states handle distribution via fair price shops. (Correct feature)
• (d) Foreign Trade: PDS is a domestic food security and distribution mechanism, not a foreign trade instrument. (Incorrect feature)
• Identification: Since (a) and (d) are incorrect features of PDS, option (4) is the correct answer.
• Exam Insight: PDS is structured around food security, price stabilization, and joint federal management.
• Key Takeaway: Child development (a) and foreign trade (d) are incorrect features of the Public Distribution System.