DU • ঢাকা বিশ্ববিদ্যালয় আইবিএ (বিবিএ) ভর্তি পরীক্ষা ২০১৭-২০১৮
প্রশ্ন ও সমাধান
The number of people diagnosed with Chikungunya fever (which is contracted from the bite of an infected mosquito) in Dhaka this month is twice the number diagnosed last month. The authorities have concluded that measures to control the mosquito population have failed in this city. All of the following, if true, would cast doubt on the authority's conclusion except -
- ক
more cases are now reported because of increases in administrative efficiency
- খ
a very high proportion of the cases were in people who had recently returned from neighboring cities
- গ
an effective diagnostic test was introduced about two months ago
- ঘ
the disease is prevalent only in some industrialized cities which have shown a dramatic increase in population due to migration
- ঙ
the incidence (number of cases per thousand) of dengue, also contracted from mosquito bites, has increased
আরও প্রশ্ন অনুশীলন করতে অ্যাপে যাও