Error spotting (exam direction): Identify the erroneous segment (A/B/C) — mark D if there is no error — 'A large scale exchange of nuclear weapons / will produce unprecedented amounts of radiation / that can penetrate into the biological tissue. / No error.' Focus on article use and the verb–preposition pairing with 'penetrate'.

Given data

• (A) A large scale exchange of nuclear weapons
• (B) will produce unprecedented amounts of radiation
• (C) that can penetrate into the biological tissue.
• (D) No error.

Concept/Approach: Verb complementation and article choice'Penetrate' is commonly used transitively without a preposition ('penetrate tissue'). Also, 'the biological tissue' is odd; use 'biological tissue' (generic) or 'the body's tissues'.

Step-by-step correction1) Remove unnecessary preposition: 'penetrate into' → 'penetrate'.2) Fix article: 'the biological tissue' → 'biological tissue'.Corrected clause: '…radiation that can penetrate biological tissue.'

Verification/AlternativeScientific style favors concise transitive use: 'Radiation penetrates matter.'

Common pitfallsOverusing 'into' after verbs that already express motion/entry; inserting gratuitous 'the' with generic mass nouns.

Final AnswerC — 'that can penetrate into the biological tissue.' → 'that can penetrate biological tissue.'