Institution: Directorate of Primary Education - DPE Exam: Primary Exam Question Solution 21-06-2019
Topic: Spelling, Subject: English Grammar (ইংরেজি গ্রামার)

Best Answer Explained in Below-:

The correct spelling of the word in question is "voluntary," option B. Understanding the etymology and meaning of the term clarifies why this spelling is accurate. "Voluntary" originates from the Latin word "voluntarius," which means "of one's free will." In English, "voluntary" describes actions taken by choice rather than obligation, often used in contexts where individuals participate willingly, such as in voluntary work or voluntary agreements.

The incorrect options illustrate common misspellings. "Volantary" (A) incorporates an erroneous "a" in place of the correct "u." "Voluntery" (C) mistakenly drops the second "a," which alters the pronunciation and doesn’t conform to standard English spelling rules. "Volantory" (D) not only introduces a spelling error by replacing the "u" with "a" but also deviates from the accepted form.

In summary, the correct choice, "voluntary," accurately reflects the term's intended meaning while adhering to the conventions of English spelling, distinguishing it from the other incorrect variants.