अर्थ : Morally or legally constraining or binding.
							उदाहरणे : 
							Attendance is obligatory.
							An obligatory contribution.
							
Possible but not necessary. Left to personal choice.
optionalअर्थ : Required by obligation or compulsion or convention.
							उदाहरणे : 
							He made all the obligatory apologies.
							
Obligatory ka meaning, vilom shabd, paryayvachi aur samanarthi shabd in Hindi. Obligatory ka matlab kya hota hai?