It is compulsory for all the students to join this tour.
A. regular
B. necessary
C. dutiful
D. obligatory
Answer: Option D
Solution(By Examveda Team)
Regular : arranged in or constituting a constant or definite pattern, especially with the same space between individual instances.Necessary : needed to be done, achieved, or present; essential.
Dutiful : conscientiously or obediently fulfilling one's duty.
Obligatory : required by a legal, moral, or other rule; compulsory.
Compulsory : required by law or a rule; obligatory.
Synonym of Compulsory is Obligatory
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