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If maximum value of .^19 Cp is a, .^20 C...

If maximum value of `.^19 C_p is a, .^20 C_q is b, .^21 C_r is c`, then relation between a, b, c is

A

` (a)/(11)= (b)/(22) =(c)/(42)`

B

` (a)/(11)=(b)/(22)=(c)/(21)`

C

` (a)/(10) =(b)/(11)=(c)/(21)`

D

` (a)/(10) =(b)/(11)= (c)/(42)`

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