\textbf{175.} The wavelength of the fifth line of the hydrogen atom spectrum in the Balmer series ($n' = 2$) is approximately how many nanometers, and in which region of the electromagnetic spectrum does it fall?
$\left(R = 0.0110 \text{ (nm)}^{-1}\right)$
(1) 433, visible \quad (2) 433, infrared \quad (3) 396, red \quad (4) 396, infrared