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If f and g are two functions defined on...

If `f and g` are two functions defined on `N ,` such that
`f(n)= {{:(2n-1if n is even), (2n+2 if n is odd):}`
and `g(n)=f(n)+f(n+1)`
Then range of `g` is
(A) `{m in N : m=` multiple of 4`}`
(B) `{`set of even natural numbers`}`
(C)`{m in N : m=4k+3,k` is a natural number
(D) `{m in N : m=`multiple of 3 or multiple of 4`}`

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