Institution: জাতীয় কবি কাজী নজরুল ইসলাম বিশ্ববিদ্যালয় (JKKNIU) Exam: ক ইউনিট || জাতীয় কবি কাজী নজরুল ইসলাম বিশ্ববিদ্যালয় || 2012
Topic: বিবিধ, Subject: Bangla Bengali literature (বাংলা সাহিত্য)

Best Answer Explained in Below-:

The question asks for the polite or standard form of the verb 'কেলিনু', which is associated with the verb ‘খেলা’ (to play). In Bengali, 'শিষ্ট চলিত রূপ' refers to the polite or formal conjugation of a verb, typically used in respectful contexts.

Among the options provided:

A) কাটালাম (katalaam) - means "I cut." This is not related to 'কেলিনু' as it indicates a different action.

B) খেললাম (khelalaam) - translates to "I played." This is the correct choice as it is the polite past tense form of the verb ‘খেলা’, aligning with the meaning of 'কেলিনু'.

C) পালন করলাম (palana karalaam) - means "I performed" or "I maintained." Though this is another polite form, it does not correspond to the action of playing.

D) আচরণ করলাম (aacharana karalaam) - means "I behaved." This, too, lacks a connection to the core verb related to 'কেলিনু'.

Thus, 'B) খেললাম' is the most appropriate choice as it accurately reflects the polite past form of the action 'to play', which is the essence of the verb in question.