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$5\, moles$ of $AB_2$ weight $125 \times 10^{-3}\, kg$ and $10\, moles$ of $A_2B_2$ weight $300 \times 10^{-3}\, kg$. The molar mass of $A(M_A)$ and molar mass of $B(M_B)$ in $kg\, mol^{-1}$ are

• A
  ${M_A} = 50 \times {10^{ - 3}}$ and ${M_B} = 25 \times {10^{ - 3}}$
• B
  ${M_A} = 10 \times {10^{ - 3}}$ and ${M_B} = 5 \times {10^{ - 3}}$
• ✓
  ${M_A} = 5 \times {10^{ - 3}}$ and ${M_B} = 10 \times {10^{ - 3}}$
• D
  ${M_A} = 25 \times {10^{ - 3}}$ and ${M_B} = 50 \times {10^{ - 3}}$