ব্যাখ্যা
• Correct Answer: ক) Investigate.
Given Options:
ক) Investigate: [verb]
English meaning: to examine a subject, situation, or problem carefully in order to discover facts or information
Bangla meaning: তদন্ত করা; অনুসন্ধান করা
খ) Investigation: [noun]
English meaning: the process of examining a crime, problem, or situation carefully
Bangla meaning: তদন্ত; অনুসন্ধান; অন্বেষণ।
গ) Investigative: [adjective]
English meaning: relating to or designed to find information, especially about a crime
Bangla meaning: সন্ধানী, সন্ধায়ী।
ঘ) Investigator: [noun]
English meaning: a person who investigates a crime, problem, or situation
Bangla meaning: তদন্তকারী।
• সুতরাং, অপশন বিবেচনা করে দেখা যায় যে, The required verb is - Investigate.
Source: Oxford, Cambridge, and Accessible Dictionary