MCxxx. which one ? MS certification

[Necuno]

i want to study one of these i think hehe

MCAD
MCSD
MCPD
MCTS

i have one core exam from MCAD allready, im not sure which i should and which i shouldn't.

what i thought was
MCAD, upgrade to MCSD, upgrade to MCPD, but then i saw MCTS and now 0_o

ty
RJT