Five people are sitting in a row. A is to the left of B but to the right of C. D is to the right of A. Who is sitting in the middle?

A. A

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

A. J

All mammals are warm-blooded. Is this statement true or false?

A. TRUE

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

A. R

A circle is a type of polygon. Is this statement true or false?

B. FALSE