Probably won't bet anything here: Denmark showed a good defensive effort vs NED and during their whole qualifying matches. They stand pretty deep, give up much space until their opponents get about 40m in front of their goal and then they pressure the ballhandling player, who normally gets double-teamed by the Danish defense. Cameroon didn't play many fast attacks vs Japan and therefore should struggle with that kind of (physical) defense.
But on the other and Denmark had one of the worst scoring attacks in Europe, if you compare them to the other teams that made it to the world cup. Today they will change their formation and add a 2nd forward, who unfortunately is infamous for needing like 100 chances to finally score and even miss the easiest shots...Cameroons defense was horrible in the past, they still made several bad mistakes vs Japan and their goalie is bad.
If I had to chose, I'd probably go with DEN+0 -117. Denmark actually can live with a tie here since they need to win vs Japan in their final game anyways unless they beat Cameroon by 2 or more goals. Cameroon on the other hand is in a must-win situation since a tie would pretty much eliminate them from the world cup.
Best bet on board seems to be a prop bet on yellow cards: Larrionda from Uruguay shows rather few yellow cards (at least below avg) and Denmark seldom gets more than 1 yellow card in a game. Since Cameroon doesn't play a fast style of play, there shouldn't be many situations where the Danish defender is one step too late and fouling while trying to tackle. The Danish team is also rather quiet, they don't complain much during the game.
Cameroon's defense is unorganised and prone to creating situations, where their opponent has more players in the area of the ball, which leaves the defense often times with fouling as the last solution to prevent a scoring chance. They also complain often times (esp. guys like Etoo) and they have a couple of players, that can be easily provoked. Denmark also relies on quick counter attacks and these counter attacks can quickly draw yellow cards, when a defense fouls to get back into their own half and re-organise.
Therefore I'd say best bet available is the h2h/Asian Handicap on yellow cards DEN +0.5 -125.