Which of the following contains a coordinate and covalent bond

Options

A. `N_2H_5^(+)`
B. `BaCl_2`
C. `HCl`
D. `H_2O`

Answer

A

Explanation

`underset(H)underset(|)overset(H)overset(|)N - underset(H)underset(|)overset(H)overset(|)N to H^(+)`
Structure of `N_2H_5^(+)` : 5 covalent bonds and 1 coordinate bonds.