Not a grievous hu -
The synopsis of forensic medicine & toxicology;Dr k.s narayan reddy;28th edition; pg.no. 154&155; All except option 2 comes under grievous hu ,contusion over the scalp is a minor injury and doesn't come under grievous hu.
Emasculation
Contusion over scalp
Fracture of bone
Hu which endanger life
Mechanical injuries