MCQ
The principal quantum number represents:
- Ashape of an orbital
- Bnumber of electrons in an orbit
- Cdistance of electron from nucleus
- Dnumber of orbitals in an orbit
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| List$-I$ | List$-II$ |
| $A$ $H _3 O ^{+}$ | $I$ Tetrahedral |
| $B$ Acetylide anion | $II$ Linear |
| $C$ $NH _4^{+}$ | $III$ Pyramidal |
| $D$ $ClO _2^{-}$ | $IV$ Bent |
Choose the correct answer from the options given below :

Product $(A)$ of the above reaction is