The correct option is D 5 kg
Weight of each tablet = 10 mg
Total number of tablets = 500000
Total weight of all the tablets = 500000×10=5000000 mg
Since 1 gram = 1000 mg, 5000000 mg=50000001000 grams=5000 grams
Since 1 kg = 1000 grams, 50001000kg=5 kg