NEET 2020 Physics Mass-Energy Equivalence MCQ Question

Using E = mc², where m = 0.5 g = 0.5 × 10⁻³ kg = 5 × 10⁻⁴ kg, and c = 3 × 10⁸ m/s. E = 5 × 10⁻⁴ × (3 × 10⁸)² = 5 × 10⁻⁴ × 9 × 10¹⁶ = 4.5 × 10¹³ J. The correct answer is D (4.5 × 10¹³ J). The original explanation computed the value correctly but then incorrectly stated option C was the answer.