Correct Answer: (iv) 12g He
Explanation:
The number of atoms present in 4g of Helium – 1 NA
The number of atoms present in 46g of Sodium – 2 NA
The number of atoms present in 0.04g of Calcium – 0.01 NA
The number of atoms present in 12g of Helium – 3 NA
Hence, 12g of Helium contains the greater number of atoms.