Let's check each statement: (a) "22 books have infinite significant figures." - A counted quantity is exact ⇒ effectively infinite sig figs. ⇒ Correct (b) "In the answer of 2.5×1.25 there are four significant figures." - 2.5 has 2 sig figs, 1.25 has 3⇒ product limited to 2 sig figs ⇒ Incorrect (c) "Zeros preceding the first non-zero digit are significant." - Leading zeros are not significant ⇒ Incorrect (d) "In 12.11+18.0+1.012 the result has three significant figures." - Add ⟶ match decimal places (fewest is 1 place) ⇒ result ≈31.1⇒3 sig figs ⇒ Correct Incorrect statements are (b) and (c) only ⇒ Option B.