Question about chemistry

A solution consists of 10 moles of solute dissolved in 100 kg of solvent. Its concentration equals:
A: 0.1 N
B: 0.1 M
C: 0.1%
D: 10 ppm
E: 0.1 m


Often molarity has the symbol M (n solute/L solution) and molality has the symbol m (n solute/kg solvent).
So here the answer would be 0.1 m

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