(A) "I think we __________ followed" → Requires present continuous passive for plural subject "we" → (III) are being ✓
(B) "The Church Tower __________ restored" → Requires present continuous passive for singular subject → (IV) is being ✓
(C) "After ______ arrested" → After a preposition, needs gerund form (not a complete verb) → (I) being ✓
(D) "The hotel rooms ____________ cleaned when we arrived" → Past continuous passive (plural subject + past time reference) → (II) were being ✓
Hence, Option 2: (A) - (III), (B) - (IV), (C) - (I), (D) - (II) → Each sentence requires a specific passive voice construction: (A) uses present continuous passive plural, (B) uses present continuous passive singular, (C) uses a gerund after a preposition, and (D) uses past continuous passive to match the past time context → correct