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A person is not truly bilingual unless he is equally proficient _____ both languages.

Ain

Bon

Cby

Dat

Answer:

A. in

Read Explanation:

Proficient എന്ന വാക്കിന് ശേഷം ഉപയോഗിക്കുന്ന preposition 'in' ആണ്. Eg : She's proficient in two languages. (അവൾക്കു രണ്ട് ഭാഷകളിൽ പ്രാവീണ്യമുള്ളവളാണ്.)


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