The correct answer is C. 755. 

The majority of this tattoo from substances causing green pigment (eg, chromium oxide) requires a laser addressing around the 755-nm region, such as with a ruby or alexandrite laser.

Wavelengths of 310, 532, 1064, and 1450 nm are not the major wavelengths targeted by lasers to address the removal of a green tattoo.

References:

Henley JK, Zurfley F, Ramsey ML. Laser Tattoo Removal. In: StatPearls. Treasure Island (FL): StatPearls Publishing; July 17, 2023.