The conference takes place once in three yearsTriennial = recurring ev

| The conference takes place once in three years

A. biannual

B. triennial

C. fortnightly

D. weekly

Right Answer is:

SOLUTION

Triennial = recurring every three years

Biannual = occurring once in every two years

Fortnightly = happening or produced every two weeks

Weekly = occurring once in a week

Hence, option B is the correct answer.

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