Answer is "basic".
NaOH is basic solution and it is a colorless solution. Due to the concentraion is 0.1 M, the solution contains 0.1 M of OH⁻ ions because NaOH fully dissociates into its ions as OH⁻ and Na⁺ in water.
NaOH → OH⁻ + Na⁺
pOH = -log[OH⁻]
= -log(0.1)
= 1
pH = 14 - pOH
= 14 - 1
= 13
Hence, pH of this G solution is 13 which is highly basic.
