Answer: D

Reasoning (concise):
Negative pressure transmitted through a ventouse cup makes scalp and intracranial bleeding much more likely than with forceps, so rates of sub-galeal haemorrhage, cephal-haematoma and intracranial haemorrhage are all higher after vacuum extraction [Kicklighter 2007 PMID 18034165; Shekhar 2013 PMID 24431617; Towner 1999 PMID 10580069].  Cranial‐nerve injuries such as transient lateral rectus (6th-nerve) palsy are classically related to direct compression by forceps blades and therefore occur at least as often, or more often, with forceps than with ventouse; hence this is the exception [Galbraith 1994 PMID 8166202].