In the following sequence of reactions, the products (A) to (G) are formed:
i. `2CH_4(g)overset(Delta)underset(1773K)rarr(A)(g)+B(g)`
ii. `4 mol of (A) overset(Delta)underset(Ni(CN)_4+THF)rarr(C)overset(O_3//o x id.)rarr(D) only`
iii. `(A)overset((1) 1 mol of NaNH_2)underset((2) C_2H_5I)rarr(E)underset(Red hot tube)overset(3 mol of E)rarrunderset((G) only)underset(darr O_3//Red.)F`
Compounds (A) and (B), respectively, are:
A. 2-Oxobutanal
B. 2-Oxobutanoic acid
C. Methylglyoxal
D. 2-Oxopropanoic acid