Stethoscope : Doctor :: ?

• Correct Answer: ক) Keyboard : Pianist.

• Stethoscope
- Bangla Meaning: হৃদবীক্ষণ যন্ত্র; স্টেথিস্‌কোপ; রোগীর হৃদস্পন্দন ও শ্বাসপ্রশ্বাসক্রিয়া পরীক্ষা করার জন্য ডাক্তার যে যন্ত্র ব্যবহার করেন।
- English Meaning: a medical device that allows a doctor to listen to your heart, lungs, or other part of your body.

• Doctor
- Bangla Meaning: চিকিৎসক, ডাক্তার।
- English Meaning: a person with a medical degree whose job is to treat people who are ill or injured.

• Other Options:
ক) Keyboard : Pianist
• Keyboard
- Bangla Meaning: কীবোর্ড; পিয়ানো বা কম্পিউটারের বোতামযুক্ত ইনপুট যন্ত্র।
- English Meaning: a musical instrument having keys like a piano, or the set of keys on this type of instrument: Steve plays keyboards.

• Pianist
- Bangla Meaning: পিয়ানোবোদক।
- English Meaning: someone who plays the piano.

• Explanation:
- Just as a doctor uses a stethoscope, a keyboard is used by a pianist.
- This forms a clear Tool : Professional User analogy.

খ) Microscope : Engineer
• Microscope
- Bangla Meaning: আণুবীক্ষণ যন্ত্র।
- English Meaning: a device that uses lenses to make very small objects look larger.
• Engineer
- Bangla Meaning: প্রকৌশলী।
- English Meaning: a person whose job is to design or build machines, engines, or electrical equipment, or things such as roads, railways, or bridges, using scientific principles.
• Engineers rarely use microscopes in their core profession. This pair is weak and inconsistent with the analogy.

গ) Chalk : Scientist
• Chalk
- Bangla Meaning: চুনাপাথর; ; চুনাপাথর বা এই জাতীয় পদার্থ দিয়ে তৈরি লেখা ও আঁকার খড়ি।
- English Meaning: a type of soft, white rock, or a similar substance.

• Scientist
- Bangla Meaning: বিজ্ঞানী।
- English Meaning: an expert who studies or works in one of the sciences.
- Chalk is more closely associated with teachers, not scientists.

ঘ) Scalpel : Artist
• Scalpel
- Bangla Meaning: শল্যবিদদের ছোট হালকা ছুরি।
- English Meaning: a very sharp knife that is used for cutting through skin and flesh during an operation.

• Artist
- Bangla Meaning: শিল্পী।
- English Meaning: someone who paints, draws, or makes sculptures.
- A scalpel is used by surgeons, not artists. This breaks the tool-user analogy.

• Finally, Analogical সম্পর্ক অনুসারে এখানে পেশা এবং পেশার সাথে জড়িত যন্ত্রের ব্যবহার হয়েছে।
→ Stethoscope : Doctor :: Keyboard : Pianist.
→ Both are examples of Tool : Professional user

Source: Merriam-Webster Dictionary, Accessible Dictionary, Cambridge Dictionary.