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নীচের কোন দিনটিতে সূর্য নিরক্ষরেখার উপর লম্বভাবে (90° কোণে) কিরণ দেয় ?
(A) 21 শে মার্চ
(B) 21 শে নভেম্বর
(C) 21 শে ডিসেম্বর
(D) 21 শে জুন
तल दिएका कुन दिनमा सूर्यले भूमध्य रेखा माथी लम्ब भर ( 90°) किरण दिछ?
(A) 21st मार्च
(B) 21st नोभेमबर
(C) 21st डिसेमबर
(D) 21st जुन
Answer : (A) 21 শে মার্চ