They are asking, in a complicated way, the mode of action of Bethanechol. All the other options are not muscarinic receptors except parasympathetic stimulation.
https://www.medicalnewstoday.com/articles/320718.php
"Myositis ossificans usually occurs where a person has experienced a single traumatic injury, such as sustaining a hit while playing football or soccer that causes a deep muscle bruise.
It can also happen when there is a repetitive injury to the same area, such as in the thighs of horseback riders. Very rarely, myositis ossificans can occur after a severe muscle strain."
https://i.gyazo.com/af438e2d71c87b9c3e05ab802628526e.png
Femoral Hernia- More likely to present with incarcerations strangulation than inguinal hernias. Strangulation cuts off blood flow which results in ischemia and necrosis (pain/red/swollen), and incarceration results in bowel being trapped in hernia
Plus, all the other options are not associated with B2 agonist, so just by process of elimination, tremor is the only one left