Match List I with List II
| List I | List II | ||
|---|---|---|---|
| Invention | Invented by | ||
| A. | Penicillin | I. | Alfred Nobel |
| B. | Dynamite | II. | Alexander Fleming |
| C. | Telegraph code | III. | Henry Bessemer |
| D. | Steel production | IV. | Samuel F.B. Morse |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → A-II, B-I, C-IV, D-III
Each invention is matched with the person who discovered or developed it.
(A) Penicillin — this matches (II) Alexander Fleming. The Scottish scientist noticed in 1928 that a mould killed the bacteria around it; penicillin, made from that mould, became the first antibiotic.
(B) Dynamite — this matches (I) Alfred Nobel. The Swedish chemist made nitroglycerine safe to handle by soaking it into a porous earth (1867); his fortune later funded the Nobel Prizes.
(C) Telegraph code — this matches (IV) Samuel F.B. Morse. The American inventor built an electric telegraph and the Morse code of dots and dashes used to send messages over it (1830s–1840s).
(D) Steel production — this matches (III) Henry Bessemer. The Bessemer process (1856) blows air through molten pig iron to burn off carbon, which made cheap steel in large quantities possible for the first time.