14:I[5014,["/_next/static/chunks/11d1gk4m2o846.js","/_next/static/chunks/14mrh2-p_w84d.js","/_next/static/chunks/40y9lkvta2o_p.js"],"default"] 15:I[38392,["/_next/static/chunks/11d1gk4m2o846.js","/_next/static/chunks/14mrh2-p_w84d.js","/_next/static/chunks/40y9lkvta2o_p.js"],"PracticeCard"] 17:I[70570,["/_next/static/chunks/11d1gk4m2o846.js","/_next/static/chunks/14mrh2-p_w84d.js","/_next/static/chunks/40y9lkvta2o_p.js"],"ExamAppearanceBadge"] 16:T5e2,

The incorrect word is - খ) diarhoea
Diarrhoea/Diarrhea is the correct word.

• Diarrhoea/Diarrhea (noun)-
- English Meaning: an illness in which waste matter is emptied from the bowels much more frequently than normal, and in liquid form.
- Bangla Meaning: অতিসার; উদরাময়।

• Example sentence:
- He is suffering from diarrhoea, so he needs to drink plenty of fluids.
- Bangla meaning: সে ডায়রিয়ায় ভুগছে, তাই তাকে অনেক পানি ও তরল খাবার খেতে হবে।

• Other options
- Diabetes (বহুমূত্ররোগ): any of various abnormal conditions characterized by the secretion and excretion of excessive amounts of urine.
- Pneumonia (একটি বা উভয় ফুসফুসের প্রদাহঘটিত গুরুতর রোগ; ফুসফুসপ্রদাহ): a serious illness affecting one or both lungs that makes breathing difficult
- Hygiene (স্বাস্থ্যবিজ্ঞান; স্বাস্থ্যবিধি): the practice of keeping yourself and your living and working areas clean in order to prevent illness and disease

Source:
1. Oxford Learners Dictionaries.
2. Merriam-Webster Dictionary
3. Accessible Dictionary.