Statement-1: ${\mathrm{Cu}}^{+}$ion is colorless.
Statement-2: Four water molecules are coordinated to ${\mathrm{Cu}}^{+}$ ion in water.

(b) Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1. 

(a) Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1.

(c) Statement--1 is True. Statement 2 is False.  

(d) Statement-1 is False, Statement-2 is True. (e) Statement-I and Statement-2 both are False