भारताचे संविधान 26 जानेवारी 1950 रोजी रुढ झाले. त्याबाबतीतील पुढील दोन विधानांपैकी कोणते योग्य आहे ?
(a) हा दिनांक निवडण्यात आला कारण काँग्रेसने डिसेम्बर 1929 च्या लाहोरच्या अधिवेशनात पूर्ण स्वराज्याची मागणी मान्य केली व सर्व भारतीयांना आवाहन केले होते की हा दिवस प्रत्येक वर्षी स्वतंत्रता दिवस म्हणून पाळला जावा.
(b) संविधानाचे उगमस्थान अधिनियम 1935 मध्ये व अमेरिका, स्वित्झरलँड, आयरलैंड, ब्रिटेन, फ्राँस व स्पेन यांच्या संविधानात आहे.

The correct answer is Option A (Only (a)).

Key Points:
• Historical Background of the Indian Constitution's Enforcement:
• Historical Significance of 26th January: At the Lahore session of the Indian National Congress in December 1929 under Jawaharlal Nehru's presidency, the historic 'Purna Swaraj' (Complete Independence) resolution was passed. It was decided that 26th January 1930 would be celebrated nationwide as the first 'Independence Day' (Poorna Swaraj Day), a custom observed annually until 1947. Hence, to commemorate this date, the Constitution came into effect on 26th January 1950.
• Sources of the Constitution: Statement (b) is inaccurate because while the Indian Constitution borrowed structural features heavily from the Government of India Act 1935, UK, USA, Ireland, Australia, Canada, USSR, Germany, South Africa, and France, constitutional provisions were not drawn from the Swiss or Spanish constitutions in any primary structural capacity recognized in standard sources.
• Adoption vs. Commencement: The Constitution was formally adopted by the Constituent Assembly on 26th November 1949 and commenced fully on 26th January 1950.
• Key Takeaway: 26th January was chosen for Constitution Day to commemorate the 1930 declaration of Purna Swaraj from the 1929 Lahore Session.