Which of the following statement is wrong?A. Among the following elements : `K, Mn, Ca, Cs, Fe, Cu, Pb, Os, Y` The number of transition element is `4`.B. All the lanthanides and actionides belong to `III B` or the `3rd` group in the periodic table.C. The inner transition elements belong to the `f`-block of the periodic table and are shown separately at the bottom of the periodic table.D. The `d`-block elements have variable valency.

Which of the following statement is wrong?A. Among the following eleme

1.	Which of the following statement is wrong?A. Among the following elements : `K, Mn, Ca, Cs, Fe, Cu, Pb, Os, Y` The number of transition element is `4`.B. All the lanthanides and actionides belong to `III B` or the `3rd` group in the periodic table.C. The inner transition elements belong to the `f`-block of the periodic table and are shown separately at the bottom of the periodic table.D. The `d`-block elements have variable valency.
Answer» Correct Answer - A (a) Statement (a) is wrong. The number of transition elements is five `(Mn, Fe, Cu, Os, Y)`.

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