In alphabet series, some alphabets are missing which are given in that order as one of the alternatives below it. Choose the correct alternative. - b _ abbc _ bbca _ bcabb _ ab

C. CABC

What letter should replace the question mark in the series: z, x, v, t, ?

C. Q

Find the missing letter in the series: b, d, f, h, ?

A. J

Identify the missing letter in the series: z, x, v, t, ?

A. R

What letter should come next in the series: a, c, e, g, ?

B. H