Complete analogous pair - Errate : Books : : Flaws : ?

A. MANUSCRIPTS

Given interchanges :
Signs + and - and numbers 4 and 8.

B. 4 - 8 + 12 = 0

In following questions, a sequence of groups of alphabets and numbers is provided with one term missing , Choose the missing term from options. - LXF, MTJ, NPN, OLR, ?

A. PHV

Choose analogous pair - Traffic : Road

C. BLOOD : VEINS

If AT = 20, BAT = 40, then CAT will be equal to

C. 60