Which of the arguments is not valid in proving sum of two odd number – McqOptions

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1.	Which of the arguments is not valid in proving sum of two odd number is not odd.
A.	3 + 3 = 6, hence true for all
B.	2n +1 + 2m +1 = 2(n+m+1) hence true for all
C.	all of the mentioned
D.	none of the mentioned
Answer» B. 2n +1 + 2m +1 = 2(n+m+1) hence true for all

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