What is the most common type of conjoined twins?

What is the most common type of conjoined twins ?
Paraphagus or thoracophagus
In delta videos mam told paraphagus but in Q bank it is thoracophagus
Please explain

Paraphagus

Thank you so much, but in q-bank it is thoracophagus

Mc paraphagus>thoracophagus

Least common rachiphagus>craniophagus