The correct option is E 162 kcal
The molar mass of ammonia is 17 g/mol.
34 grams of ammonia corresponds to 34g17g/mol=2moles.
The heat of combustion of gaseous ammonia is 81 kcal/mole.
During the reaction of 34 grams (2 moles) of ammonia with excess amount of oxygen, heat evolved will be 2mol×81kcal/mol=162kcal.