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Combinatorics

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Invalid Multinomial Coefficient

COMBIN-XYJE04

Which expression does not make sense?

A

$${10\choose 4,\,6}$$

B

$${10\choose 5,\,4,\,1}$$

C

$${10\choose 3,\, 3,\, 3,\, 1}$$

D

$${10\choose 3,\, 3,\, 3}$$

E

$${10\choose 2,\, 2,\, 2,\, 2,\,1,\,1}$$